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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 10-Q

(Mark One)
        QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the quarterly period ended June 30, 20202021
OR
        TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from        to
Commission File Number: 001-35061
NeoPhotonics Corporation
(Exact name of registrant as specified in its charter)

   
Delaware 94-3253730
(State or other jurisdiction
of incorporation or organization)
 (I.R.S. Employer
Identification No.)
3081 Zanker Road
San Jose, California 95134
(Address of principal executive offices, zip code)
(408) 232-9200
(Registrant’s telephone number, including area code)
Securities registered pursuant to Section 12(b) of the Act:

Title of each class:Trading symbol(s):Name of each exchange on which registered
Common Stock, $0.0025 par valueNPTNThe New York Stock Exchange
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 (“Exchange Act”) during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.     Yes       No        
    Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).     Yes       No    
    Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.
Large accelerated filer Accelerated filer
Non-accelerated filerSmaller reporting company
Emerging growth company  


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    If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  
    Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).     Yes       No    
    As of July 29, 2020,27, 2021, there were approximately 49,565,40552,185,425 shares of the registrant’s Common Stock outstanding. 


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NEOPHOTONICS CORPORATION
For the Quarter Ended June 30, 20202021
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PART I. FINANCIAL INFORMATION
ITEM 1. CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
NEOPHOTONICS CORPORATION
CONDENSED CONSOLIDATED BALANCE SHEETS
(Unaudited)
 As of
(In thousands, except par value data)June 30, 2021December 31, 2020
ASSETS
Current assets:  
Cash and cash equivalents$66,836 $95,117 
Short-term investments27,672 27,669 
Restricted cash495 489 
Accounts receivable, net47,763 45,232 
Inventories44,341 46,901 
Prepaid expenses and other current assets14,307 20,173 
Total current assets201,414 235,581 
Property, plant and equipment, net59,942 66,765 
Operating lease right-of-use assets14,452 13,823 
Purchased intangible assets, net1,139 1,468 
Goodwill1,115 1,115 
Other long-term assets5,193 4,912 
Total assets$283,255 $323,664 
LIABILITIES AND STOCKHOLDERS’ EQUITY  
Current liabilities:  
Accounts payable$46,648 $43,539 
Current portion of long-term debt3,033 3,232 
Accrued and other current liabilities25,461 42,053 
Total current liabilities75,142 88,824 
Long-term debt, net of current portion27,488 30,327 
Operating lease liabilities, noncurrent14,787 14,522 
Other noncurrent liabilities8,446 9,584 
Total liabilities125,863 143,257 
Commitments and contingencies (Note 11)00
Stockholders’ equity:  
Preferred stock, $0.0025 par value, 10,000 shares authorized, 0 shares issued
or outstanding
Common stock, $0.0025 par value, 100,000 shares authorized; at June 30, 2021,
52,080 shares issued and outstanding; at December 31, 2020, 50,457 shares issued
and outstanding
130 126 
Additional paid-in capital602,877 597,460 
Accumulated other comprehensive income1,423 1,735 
Accumulated deficit(447,038)(418,914)
Total stockholders’ equity157,392 180,407 
Total liabilities and stockholders’ equity$283,255 $323,664 
 As of
(In thousands, except par data)June 30, 2020December 31, 2019
ASSETS
Current assets:  
Cash and cash equivalents$94,536  $70,467  
Short-term investments7,665  7,638  
Restricted cash11,055  10,972  
Accounts receivable, net of allowance for doubtful accounts61,223  68,890  
Inventories50,449  46,930  
Prepaid expenses and other current assets29,268  25,851  
Total current assets254,196  230,748  
Property, plant and equipment, net73,052  81,133  
Operating lease right-of-use assets14,662  15,603  
Purchased intangible assets, net1,771  2,151  
Goodwill1,115  1,115  
Other long-term assets3,838  3,929  
Total assets$348,634  $334,679  
LIABILITIES AND STOCKHOLDERS’ EQUITY  
Current liabilities:  
Accounts payable$61,636  $58,554  
Current portion of long-term debt3,083  3,044  
Accrued and other current liabilities45,354  47,481  
Total current liabilities110,073  109,079  
Long-term debt, net of current portion33,235  39,237  
Operating lease liabilities, noncurrent15,471  16,543  
Other noncurrent liabilities10,827  9,614  
Total liabilities169,606  174,473  
Commitments and contingencies (Note 11)
Stockholders’ equity:  
Preferred stock, $0.0025 par value, 10,000 shares authorized, 0 shares issued
or outstanding
—  —  
Common stock, $0.0025 par value, 100,000 shares authorized; at June 30, 2020,
49,547 shares issued and outstanding; at December 31, 2019, 48,526 shares issued
and outstanding
124  121  
Additional paid-in capital590,800  582,504  
Accumulated other comprehensive loss(9,380) (7,871) 
Accumulated deficit(402,516) (414,548) 
Total stockholders’ equity179,028  160,206  
Total liabilities and stockholders’ equity$348,634  $334,679  
See accompanying Notes to Condensed Consolidated Financial Statements.
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NEOPHOTONICS CORPORATION
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
(Unaudited)
 Three Months Ended
June 30,
Six Months Ended
June 30,
 
(In thousands, except per share data)2021202020212020
Revenue$65,010 $103,171 $125,935 $200,572 
Cost of goods sold55,135 69,669 102,721 137,344 
Gross profit9,875 33,502 23,214 63,228 
Operating expenses:    
Research and development15,410 13,689 28,508 25,573 
Sales and marketing3,362 4,279 7,227 7,938 
General and administrative7,398 8,803 14,692 15,592 
Acquisition and asset sale related costs (recoveries)(36)120 127 132 
Restructuring charges22 22 
Total operating expenses26,156 26,891 50,576 49,235 
Income (loss) from operations(16,281)6,611 (27,362)13,993 
Interest income140 22 245 120 
Interest expense(220)(301)(447)(679)
Other income (expense), net(880)(195)263 1,003 
Total interest and other income (expense), net(960)(474)61 444 
Income (loss) before income taxes(17,241)6,137 (27,301)14,437 
Income tax provision(192)(412)(823)(2,405)
Net income (loss)$(17,433)$5,725 $(28,124)$12,032 
Basic net income (loss) per share$(0.34)$0.12 $(0.55)$0.25 
Diluted net income (loss) per share$(0.34)$0.11 $(0.55)$0.24 
Weighted average shares used to compute basic net income (loss) per share51,634 49,077 51,178 48,846 
Weighted average shares used to compute diluted net income (loss) per share51,634 51,661 51,178 51,124 
See accompanying Notes to Condensed Consolidated Financial Statements.
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NEOPHOTONICS CORPORATION
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONSCOMPREHENSIVE INCOME (LOSS)
(Unaudited)
 Three Months Ended
June 30,
Six Months Ended
June 30,
 
(in thousands)2021202020212020
Net income (loss)$(17,433)$5,725 $(28,124)$12,032 
Other comprehensive income (loss):  
Foreign currency translation adjustments, net of 0 tax2,031 461 (312)(1,509)
Total other comprehensive income (loss)2,031 461 (312)(1,509)
Comprehensive income (loss)$(15,402)$6,186 $(28,436)$10,523 
 Three Months Ended
June 30,
Six Months Ended
June 30,
 
(In thousands, except per share data)2020201920202019
Revenue$103,171  $81,690  $200,572  $161,056  
Cost of goods sold69,669  66,015  137,344  129,644  
Gross profit33,502  15,675  63,228  31,412  
Operating expenses:    
Research and development13,689  13,793  25,573  28,476  
Sales and marketing4,279  3,623  7,938  8,226  
General and administrative8,803  7,174  15,592  14,927  
Amortization of purchased intangible assets—  —  —  119  
Asset sale related costs120  47  132  376  
Restructuring charges—  79  —  258  
Gain on asset sale—  (817) —  (817) 
Total operating expenses26,891  23,899  49,235  51,565  
Income (loss) from operations6,611  (8,224) 13,993  (20,153) 
Interest income22  99  120  198  
Interest expense(301) (496) (679) (989) 
Other income (expense), net(195) 1,090  1,003  (508) 
Total interest and other income (expense), net(474) 693  444  (1,299) 
Income (loss) before income taxes6,137  (7,531) 14,437  (21,452) 
Income tax (provision) benefit(412) 205  (2,405) 35  
Net income (loss)$5,725  $(7,326) $12,032  $(21,417) 
Basic net income (loss) per share$0.12  $(0.16) $0.25  $(0.46) 
Diluted net income (loss) per share$0.11  $(0.16) $0.24  $(0.46) 
Weighted average shares used to compute basic net income (loss) per share49,077  46,754  48,846  46,585  
Weighted average shares used to compute diluted net income (loss) per share51,661  46,754  51,124  46,585  

See accompanying Notes to Condensed Consolidated Financial Statements.
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NEOPHOTONICS CORPORATION
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)STOCKHOLDERS’ EQUITY  
(Unaudited)
Three Months Ended June 30, 2021Common stockAdditional paid-in capitalAccumulated other comprehensive income (loss)Accumulated deficitTotal stockholders’ equity
(In thousands)SharesAmount
Balances at March 31, 202151,009 $128 $599,744 $(608)$(429,605)$169,659 
Comprehensive income (loss)— — — 2,031 (17,433)(15,402)
Issuance of common stock upon exercise of stock options199 — 1,045 — — 1,045 
Issuance of common stock under employee stock purchase plan235 1,548 — — 1,549 
Issuance of common stock for vested restricted stock units802 (2)— — 
Tax withholding related to vesting of restricted stock units(165)(1)(1,846)— — (1,847)
Stock-based compensation costs— — 2,388 — — 2,388 
Balances at June 30, 202152,080 $130 $602,877 $1,423 $(447,038)$157,392 
 Three Months Ended
June 30,
Six Months Ended
June 30,
 
(in thousands)2020201920202019
Net income (loss)$5,725  $(7,326) $12,032  $(21,417) 
Other comprehensive income (loss):  
Foreign currency translation adjustments, net of 0 tax461  (1,790) (1,509) 1,147  
Total other comprehensive (loss) income461  (1,790) (1,509) 1,147  
Comprehensive income (loss)$6,186  $(9,116) $10,523  $(20,270) 
Three Months Ended June 30, 2020Common stockAdditional paid-in capitalAccumulated other comprehensive income (loss)Accumulated deficitTotal stockholders’ equity
(In thousands)SharesAmount
Balances at March 31, 202048,662 $122 $585,198 $(9,841)$(408,241)$167,238 
Comprehensive income— — — 461 5,725 6,186 
Issuance of common stock upon exercise of stock options263 1,114 — — 1,115 
Issuance of common stock under employee stock purchase plan204 — 1,331 — — 1,331 
Issuance of common stock for vested restricted stock units483 (1)— — 
Tax withholding related to vesting of restricted stock units(65)— (567)— — (567)
Stock-based compensation costs— — 3,725 — — 3,725 
Balances at June 30, 202049,547 $124 $590,800 $(9,380)$(402,516)$179,028 

See accompanying Notes to Condensed Consolidated Financial Statements.













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NEOPHOTONICS CORPORATION
CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY  
(Unaudited)
Six Months Ended June 30, 2021Common stockAdditional paid-in capitalAccumulated other comprehensive income (loss)Accumulated deficitTotal stockholders’ equity
(In thousands)SharesAmount
Balances at December 31, 202050,457 $126 $597,460 $1,735 $(418,914)$180,407 
Comprehensive loss— — — (312)(28,124)(28,436)
Issuance of common stock upon exercise of stock options398 2,154 — — 2,155 
Issuance of common stock under employee stock purchase plan235 1,548 — — 1,549 
Issuance of common stock for vested restricted stock units1,305 (3)— — 
Tax withholding related to vesting of restricted stock units(315)(1)(3,682)— — (3,683)
Stock-based compensation costs— — 5,400 — — 5,400 
Balances at June 30, 202152,080 $130 $602,877 $1,423 $(447,038)$157,392 
Six Months Ended June 30, 2020Common stockAdditional paid-in capitalAccumulated other comprehensive income (loss)Accumulated deficitTotal stockholders’ equity
(In thousands)SharesAmount
Balances at December 31, 201948,526 $121 $582,504 $(7,871)$(414,548)$160,206 
Comprehensive income (loss)— — — (1,509)12,032 10,523 
Issuance of common stock upon exercise of stock options316 1,346 — — 1,347 
Issuance of common stock under employee stock purchase plan204 1,331 — — 1,332 
Issuance of common stock for vested restricted stock units597 (1)— — 
Tax withholding related to vesting of restricted stock units(96)— (786)— — (786)
Stock-based compensation costs— — 6,406 — — 6,406 
Balances at June 30, 202049,547 $124 $590,800 $(9,380)$(402,516)$179,028 




See accompanying Notes to Condensed Consolidated Financial Statements.








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NEOPHOTONICS CORPORATION
CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY  CASH FLOWS
(Unaudited)
 Six Months Ended
June 30,
 
(In thousands)20212020
Cash flows from operating activities  
Net income (loss)$(28,124)$12,032 
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:  
Depreciation and amortization12,486 13,292 
Stock-based compensation expense5,617 6,305 
Deferred taxes989 1,544 
Others171 179 
Gain on sale of assets and other write-offs(14)(24)
Allowance for doubtful accounts(1)(6)
Write-down of inventories6,096 4,173 
Amortization of operating lease right-of-use assets1,025 931 
Foreign currency remeasurement(129)(991)
Change in operating assets and liabilities:  
Accounts receivable(2,532)7,655 
Inventories(3,836)(7,899)
Prepaid expenses and other assets4,058 (3,268)
Accounts payable2,294 3,693 
Accrued and other liabilities(19,775)(3,122)
Net cash provided by (used in) operating activities(21,675)34,494 
Cash flows from investing activities  
Purchase of property, plant and equipment(5,461)(5,535)
Proceeds from sale of property, plant and equipment and other assets1,013 110 
Purchase of marketable securities(22,504)(27)
Proceeds from sale of marketable securities22,501 
Net cash used in investing activities(4,451)(5,452)
Cash flows from financing activities  
Proceeds from exercise of stock options and issuance of stock under ESPP4,143 2,679 
Tax withholding on restricted stock units(3,683)(786)
Repayment of bank loans(2,662)(6,554)
Repayment of finance lease liabilities(46)(43)
Net cash used in financing activities(2,248)(4,704)
Effect of exchange rates on cash, cash equivalents and restricted cash99 (186)
Net increase (decrease) in cash, cash equivalents and restricted cash(28,275)24,152 
Cash, cash equivalents and restricted cash at the beginning of the period95,606 81,439 
Cash, cash equivalents and restricted cash at the end of the period$67,331 $105,591 
Supplemental disclosure of non-cash investing and financing activities:
Unpaid property, plant and equipment in accounts payable$1,952 $1,296 
Right-of-use asset in exchange for a lease liability$1,645 $

Three Months Ended June 30, 2020Common stockAdditional paid-in capitalAccumulated other comprehensive lossAccumulated deficitTotal stockholders’ equity
(In thousands)SharesAmount
Balances at March 31, 202048,662  $122  $585,198  $(9,841) $(408,241) $167,238  
Comprehensive income—  —  —  461  5,725  6,186  
Issuance of common stock upon exercise of stock options263   1,114  —  —  1,115  
Issuance of common stock under employee stock purchase plan204  —  1,331  —  —  1,331  
Issuance of common stock for vested restricted stock units483   (1) —  —  —  
Tax withholding related to vesting of restricted stock units(65) —  (567) —  —  (567) 
Stock-based compensation costs—  —  3,725  —  —  3,725  
Balances at June 30, 202049,547  $124  $590,800  $(9,380) $(402,516) $179,028  

Three Months Ended June 30, 2019Common stockAdditional paid-in capitalAccumulated other comprehensive lossAccumulated deficitTotal stockholders’ equity
(In thousands)SharesAmount
Balances at March 31, 201946,455  $116  $568,194  $(4,189) $(411,563) $152,558  
Comprehensive loss—  —  —  (1,790) (7,326) (9,116) 
Issuance of common stock upon exercise of stock options118  —  406  406  
Issuance of common stock under employee stock purchase plan254   1,234  —  —  1,235  
Issuance of common stock for vested restricted stock units381   (1) —  —  —  
Tax withholding related to vesting of restricted stock units(56) —  (245) —  —  (245) 
Stock-based compensation costs—  —  3,146  —  —  3,146  
Balances at June 30, 201947,152  $118  $572,734  $(5,979) $(418,889) $147,984  

See accompanying Notes to Condensed Consolidated Financial Statements.

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NEOPHOTONICS CORPORATION
CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY  
(Unaudited)

Six Months Ended June 30, 2020Common stockAdditional paid-in capitalAccumulated other comprehensive lossAccumulated deficitTotal stockholders’ equity
(In thousands)SharesAmount
Balances at December 31, 201948,526  $121  $582,504  $(7,871) $(414,548) $160,206  
Comprehensive income (loss)—  —  —  (1,509) 12,032  10,523  
Issuance of common stock upon exercise of stock options316   1,346  —  —  1,347  
Issuance of common stock under employee stock purchase plan204   1,331  —  —  1,332  
Issuance of common stock for vested restricted stock units597   (1) —  —  —  
Tax withholding related to vesting of restricted stock units(96) —  (786) —  —  (786) 
Stock-based compensation costs—  —  6,406  —  —  6,406  
Balances at June 30, 202049,547  $124  $590,800  $(9,380) $(402,516) $179,028  

Six Months Ended June 30, 2019Common stockAdditional paid-in capitalAccumulated other comprehensive lossAccumulated deficitTotal stockholders’ equity
(In thousands)SharesAmount
Balances at December 31, 201846,378  $116  $564,722  $(7,126) $(397,472) $160,240  
Comprehensive income (loss)—  —  —  1,147  (21,417) (20,270) 
Issuance of common stock upon exercise of stock options166  —  572  —  —  572  
Issuance of common stock under employee stock purchase plan254   1,234  —  —  1,235  
Issuance of common stock for vested restricted stock units423   (1) —  —  —  
Tax withholding related to vesting of restricted stock units(69) —  (327) —  —  (327) 
Stock-based compensation costs—  —  6,534  —  —  6,534  
Balances at June 30, 201947,152  $118  $572,734  $(5,979) $(418,889) $147,984  

See accompanying Notes to Condensed Consolidated Financial Statements.

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NEOPHOTONICS CORPORATION
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
(Unaudited)
 Six Months Ended
June 30,
 
(In thousands)20202019
Cash flows from operating activities  
Net income (loss)$12,032  $(21,417) 
Adjustments to reconcile net loss to net cash provided by operating activities:  
Depreciation and amortization13,292  16,942  
Stock-based compensation expense6,305  6,343  
Deferred taxes1,544  —  
Others179  216  
Gain on sale of assets and other write-offs(24) (541) 
Allowance for doubtful accounts(6) (8) 
Write-down of inventories4,173  5,479  
Amortization of operating lease right-of-use assets931  872  
Foreign currency remeasurement(991) 614  
Change in operating assets and liabilities:  
Accounts receivable7,655  15,163  
Inventories(7,899) (2,103) 
Prepaid expenses and other assets(3,268) 3,053  
Accounts payable3,693  (6,933) 
Accrued and other liabilities(3,122) (8,247) 
Net cash provided by operating activities34,494  9,433  
Cash flows from investing activities  
Purchase of property, plant and equipment(5,535) (4,042) 
Proceeds from sale of property, plant and equipment and other assets110  1,986  
Purchase of marketable securities(27) (86) 
Net cash used in investing activities(5,452) (2,142) 
Cash flows from financing activities  
Proceeds from exercise of stock options and issuance of stock under ESPP2,679  1,807  
Tax withholding on restricted stock units(786) (327) 
Proceeds from bank loans, net of debt issuance costs—  5,000  
Repayment of bank loans(6,554) (11,529) 
Repayment of notes payable—  (4,860) 
Repayment of finance lease liabilities(43) (46) 
Net cash used in financing activities(4,704) (9,955) 
Effect of exchange rates on cash, cash equivalents and restricted cash(186) 66  
Net increase (decrease) in cash, cash equivalents and restricted cash24,152  (2,598) 
Cash, cash equivalents and restricted cash at the beginning of the period81,439  69,238  
Cash, cash equivalents and restricted cash at the end of the period$105,591  $66,640  
Supplemental disclosure of non-cash investing and financing activities:  
Unpaid property, plant and equipment in accounts payable$1,296  $1,514  

See accompanying Notes to Condensed Consolidated Financial Statements.
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NeoPhotonics Corporation Notes to Condensed Consolidated Financial Statements
(Unaudited)


Note 1. Basis of presentation and significant accounting policies
Basis of Presentation and Consolidation
The condensed consolidated financial statements of NeoPhotonics Corporation (“NeoPhotonics” or the “Company”) as of June 30, 20202021 and for the three and six months ended June 30, 20202021 and 2019,2020, have been prepared in accordance with the instructions on Form 10-Q pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). In accordance with those rules and regulations, the Company has omitted certain information and notes normally provided in the Company’s annual consolidated financial statements. In the opinion of management, the condensed consolidated financial statements contain all adjustments, consisting only of normal recurring items, except as otherwise noted, necessary for the fair presentation of the Company’s financial position and results of operations for the interim periods. The year-endThese condensed consolidated balance sheet data was derived from audited consolidated financial statements but doesdo not include all disclosures required by U.S. generally accepted accounting principles (“U.S. GAAP”). These condensed consolidated financial statements and should be read in conjunction with the Consolidated Financial Statements and Notes thereto included in the Company’s Annual Report on Form 10-K/A10-K for the fiscal year ended December 31, 2019.2020. The results of operations for the three and six months ended June 30, 20202021 are not necessarily indicative of the results expected for the entire fiscal year. All intercompany accounts and transactions have been eliminated.
Certain Significant Risks and Uncertainties
The Company operates in a dynamic industry, and accordingly, can be affected by a variety of factors. For example, any of the following areas could have a negative effect on the Company in terms of its future financial position, results of operations or cash flows: the general state of the U.S., China and world economies; the highly cyclical nature of the industries the Company serves; successful and timely completion of product design efforts; the ability of the Company to sell its new products into new market segments; trade restrictions by the United States against the Company's customers in China, as well as potential retaliatory trade actions taken by China; the loss of any of its larger customers; restrictions on the Company's ability to sell to foreign customers due to additional U.S. or new China trade laws, regulations and requirements; disruptions of the supply chain of components needed for its products; ability to obtain additional financing; inability to meet certain debt covenants; fundamental changes in the technology underlying the Company’s products; the hiring, training and retention of key employees; successful and timely completion of product design efforts; and new product design introductions by competitors. The inputs into the Company’s judgments and estimates consider the economic implications of the Covid-19 pandemic as the Company knows them, on its critical and significant accounting estimates. The extent to which the Covid-19 pandemic may impact its business will depend on future developments, which are highly uncertain, such as the duration of the outbreak, travel restrictions, governmental mandates issued to mitigate the spread of the disease, business closures, economic disruptions, and the effectiveness of actions taken to contain and treat the virus. Accordingly, future adverse developments with respect to the Covid-19 pandemic may have a negative impact on its sales, supply chain and results of operations. The inputs into the Company's judgments and estimates also consider the Department of Commerce Entities List restrictions on Huawei Technologies effective September 2020 for the Company and loss of business from Huawei Technologies. See also Note 7.
Concentration
In the three months ended June 30, 2021, three customers were each greater than 10% of the Company’s total revenue and the Company's top five customers represented approximately 77% of the Company’s total revenue. In the three months ended June 30, 2020, Huawei Technologies, together with its affiliate HiSilicon Technologies Co. Ltd. (collectively "Huawei") accounted for approximately 52% of the Company's total revenue. Onerevenue, one other customer was greater than 10% and the Company’s top five customers represented approximately 82% of the Company’s total revenue.

In the threesix months ended June 30, 2019, Huawei accounted for approximately 36% of the Company's total revenue. One other customer was2021, four customers were each greater than 10% of the Company’s total revenue and the Company’sCompany's top five customers represented approximately 84%76% of the Company’s total revenue. In the six months ended June 30, 2020, Huawei accounted for approximately 52% of the Company's total revenue. Onerevenue, one other customer was greater than 10% and the Company’s top five customers represented approximately 83% of the Company’s total revenue. In the six months ended June 30, 2019, Huawei accounted for approximately 43% of the Company's total revenue. One other customer was greater than 10% and the Company’s top five customers represented approximately 85% of the Company’s total revenue.
As of June 30, 2020 and2021, three customers accounted for a total of 57% of the Company’s total accounts receivable. As of December 31, 2019, two2020, three customers respectively, each accounted for more than 10%a total of 65% of the Company’s total accounts receivable.
Use of Estimates
The preparation of financial statements in accordance with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported revenue and expenses during the reporting period. Significant estimates made by management include: the useful lives and recoverability of property, plant and equipment;long-lived assets; valuation allowances for deferred tax assets; valuation of excess and obsolete inventories; warranty reserves; litigation accrual and recognition of stock-based compensation, among others. Actual results could differ from these estimates.

Long-lived Assets
The Company assesses the impairment of long-lived assets whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. An impairment loss would be recognized when the sum of the future net cash flows expected to result from the use of the asset and its eventual disposition is less than its carrying amount. The estimated future cash flows are based upon, among other things, assumptions about expected future operating performance and may differ from actual cash flows.
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Notes to Condensed Consolidated Financial Statements (Continued)
(Unaudited)

Due to the additional restrictions imposed by the U.S. Bureau of Industry and Security ("BIS"), an agency of the U.S. Department of Commerce, which became effective in September 2020, and the expected loss of business from Huawei, the Company performed a recoverability test in the third and fourth quarters of 2020 and determined there was 0 impairment of long-lived assets.
Leases
The Company determines if an arrangement is a lease at inception. Operating leases are included in operating lease right-of-use ("ROU") assets, other current liabilities and operating lease liabilities on the Company's condensed consolidated balance sheets. Finance leases are included in property, plant and equipment, current portion of long-term debt and long-term debt, net of current portion on the condensed consolidated balance sheets.

Operating lease ROU assets and operating lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at commencement date. As most of the Company's leases do not provide an implicit rate, the Company uses an estimate of its incremental borrowing rate based on observed market data and other information available at the lease commencement date. The operating lease ROU assets also include any lease payments made and exclude lease incentives. Lease terms may include options to extend or terminate the lease when it is reasonably certain that the Company will exercise such options. The Company does not record leases on the condensed consolidated balance sheet with a term of one year or less. The Company does not separate lease and non-lease components but rather account for each separate component as a single lease component for all underlying classes of assets. Variable lease payments are expensed as incurred and are not included within the operating lease ROU asset and lease liability calculation. Variable lease payments primarily include reimbursements of costs incurred by lessors for common area maintenance and utilities. Lease expense for minimum operating lease payments is recognized on a straight-line basis over the lease term.
Accounting Pronouncements Recently Adopted
In January 2017,December 2019, the FASBFinancial Accounting Standards Board (FASB) issued ASU 2017-04, Intangibles-Goodwill and OtherAccounting Standards Update No. 2019-12, Income Taxes (Topic 350)740): Simplifying the TestAccounting for Goodwill Impairment (“ASU 2017-04”).Income Taxes (ASU 2019-12), which simplifies the accounting for income taxes. This standard amends the goodwill impairment test to compare the fair value of a reporting unit with its carrying amount and recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value, up to the total amount of goodwill allocated to that reporting unit. In November 2019, the FASB issued ASU 2019-10, according to which, the new standard isguidance became effective for smaller reporting companies (“SRC”) as defined by the SEC, for fiscal years beginning after December 15, 2022 including interim periods within those fiscal years.2020. The Company early adopted this ASU 2017-04 guidance on January 1, 2020. Thein the first quarter of 2021 and the adoption of this standard had nodid not have a material impact on the Company’sCompany's consolidated financial statements and related disclosures.
In November 2018, the FASB issued ASU 2018-18, Collaborative Arrangements (Topic 808): Clarifying the Interaction between Topic 808 and Topic 606, which clarifies that certain transactions between participants in a collaborative arrangement should be accounted for under ASC 606 when the counterparty is a customer. In addition, ASU 2018-18 precludes an entity from presenting consideration from a transaction in a collaborative arrangement as revenue from contracts with customers if the counterparty is not a customer for that transaction. This guidance is effective for the Company beginning after December 15, 2019, with early adoption permitted. The Company adopted new guidance on January 1, 2020. The adoption of ASU 2018-08 had no material impact on the Company’s consolidated financial statements and related disclosures.statements.
Recent Accounting Pronouncements Not Yet Effective 
In June 2016, the FASB issued ASU 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”). ASU 2016-13 amends existing guidance on the impairment of financial assets and adds an impairment model that is based on expected losses rather than incurred losses and requires an entity to recognize as an allowance its estimate of expected credit losses for its financial assets. An entity will apply this guidance through a cumulative-effect adjustment to retained earnings upon adoption (a modified-retrospective approach) while a prospective transition approach is required for debt securities for which an other-than-temporary impairment had been recognized before the effective date. In November 2019, the FASB issued ASU 2019-10, according to which, the new standard is effective for smaller reporting companies (“SRC”) as defined by the SEC, for fiscal years beginning after December 15, 2022 including interim periods within those fiscal years. The Company is in the process of evaluating the impact and timing of the adoption on its consolidated financial statements and related disclosures.
Note 2. Revenue
Product revenue
The Company develops, manufactures and sells lasers and other high speedhigh-speed optoelectronic products that transmit, receive, modify and switch high speed digital optical signals for communications networks. Revenue is derived primarily from the sale of optoelectronic laser, component and module hardware products. The Company sells its products worldwide, primarily to leading network equipment manufacturers.
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Notes to Condensed Consolidated Financial Statements (Continued)
(Unaudited)
Revenue recognition
Revenue is recognized upon transfer of control of promised products or services to customers in an amount that reflects the consideration the Company expects to receive in exchange for those products or services. The Company generally bears all costs, risk of loss or damage and retains title to the goods up to the point of transfer of control of promised products to customer. Revenue related to the sale of consignment inventories at customer vendor managed locations is not recognized until the products are pulled from consignment inventories by customers. In instances where acceptance of the product or solutions is specified by the customer, revenue is deferred until such required acceptance criteria have been met. Shipping and handling costs are included in the cost of goods sold. The Company presents revenue net of sales taxes and any similar assessments.
Nature of products
Revenue from the sale of hardware products is recognized upon transfer of control to the customer. The performance obligation for the sale of hardware products is satisfied at a point in time. The Company has aligned its products in two groups - High Speed Products and Network Products and Solutions. The following presents revenue by product group (in thousands):
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 Three Months Ended
June 30,
Six Months Ended
June 30,
 2020201920202019
High Speed Products$92,863  $72,860  $182,713  $143,028  
Network Products and Solutions10,308  8,830  17,859  18,028  
Total revenue$103,171  $81,690  $200,572  $161,056  
Notes to Condensed Consolidated Financial Statements (Continued)

(Unaudited)
 Three Months Ended
June 30,
Six Months Ended
June 30,
 2021202020212020
High Speed Products$61,032 $92,863 $118,305 $182,713 
Network Products and Solutions3,978 10,308 7,630 17,859 
Total revenue$65,010 $103,171 $125,935 $200,572 
The following table presents the Company's revenue information by geographical region. Revenue is classified based on the ship to location requested by the customer. Such classification recognizes that for many customers, including those in North America or in Europe, designated shipping points are often in China or elsewhere in Asia (in thousands):

Three Months Ended
June 30,
Six Months Ended
June 30,
Three Months Ended
June 30,
Six Months Ended
June 30,
2020201920202019 2021202020212020
ChinaChina$62,665  $38,943  $121,574  $84,490  China$24,940 $62,665 $40,183 $121,574 
AmericasAmericas16,080  19,596  34,421  33,425  Americas5,997 16,080 11,188 34,421 
Rest of worldRest of world24,426  23,151  44,577  43,141  Rest of world34,073 24,426 74,564 44,577 
Total revenueTotal revenue$103,171  $81,690  $200,572  $161,056  Total revenue$65,010 $103,171 $125,935 $200,572 
Deferred revenue
The Company records deferred revenue when cash payments are received or due in advance of the Company's performance. There were 0 deferred revenue balances as of June 30, 20202021 and December 31, 2019.2020.
Contract assets
Contract assets are rights to consideration in exchange for goods or services that the Company has transferred to a customer when such right is conditional on something other than the passage of time. Contract assets exclude any amounts presented as an accounts receivable. There were 0 contract assets balances as of June 30, 20202021 and December 31, 2019.2020.
Refund liabilities
The Company recognizes a refund liability if the Company receives consideration from a customer and expects to refund some or all of that consideration to the customer. The refund liabilities as of June 30, 20202021 and December 31, 20192020 were immaterial.
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Notes to Condensed Consolidated Financial Statements (Continued)
(Unaudited)
Note 3. Net income (loss) per share 
The following table sets forth the computation of the basic and diluted net income (loss) per share for the periods indicated (in thousands, except per share amounts): 
 Three Months Ended
June 30,
Six Months Ended
June 30,
 2021202020212020
Numerator:     
Net income (loss)$(17,433)$5,725 $(28,124)$12,032 
Denominator:  
Weighted average shares used to compute per share amount:  
Basic51,634 49,077 51,178 48,846 
Diluted51,634 51,661 51,178 51,124 
Basic net income (loss) per share$(0.34)$0.12 $(0.55)$0.25 
Diluted net income (loss) per share$(0.34)$0.11 $(0.55)$0.24 
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 Three Months Ended
June 30,
Six Months Ended
June 30,
 2020201920202019
Numerator:     
Net income (loss)$5,725  $(7,326) $12,032  $(21,417) 
Denominator:  
Weighted average shares used to compute per share amount:  
Basic49,077  46,754  48,846  46,585  
Diluted51,661  46,754  51,124  46,585  
Basic net income (loss) per share$0.12  $(0.16) $0.25  $(0.46) 
Diluted net income (loss) per share$0.11  $(0.16) $0.24  $(0.46) 
Notes to Condensed Consolidated Financial Statements (Continued)
(Unaudited)
The Company has excluded the impact of the following outstanding employee stock options and restricted stock units as well as the shares expected to be issued under its employee stock purchase plan from the computation of diluted net income (loss) per share, as their effect would have been antidilutive (in thousands): 

 Three Months Ended
June 30,
Six Months Ended
June 30,
2020201920202019
Employee stock options337  2,963  661  2,963  
Restricted stock units33  2,208  49  2,208  
Market-based restricted stock units612  647  612  647  
Performance-based restricted stock units90  —  90  —  
Employee stock purchase plan119  263  119  263  
 1,191  6,081  1,531  6,081  

 Three Months Ended
June 30,
Six Months Ended
June 30,
2021202020212020
Employee stock options1,734 337 1,734 661 
Restricted stock units2,465 33 2,465 49 
Market-based restricted stock units265 612 265 612 
Performance-based restricted stock units75 90 75 90 
Employee stock purchase plan132 119 132 119 
 4,671 1,191 4,671 1,531 
Note 4. Cash, cash equivalents, short-term investments and restricted cash 
The following table summarizes the Company’s cash, cash equivalents and restricted cash (in thousands):
 June 30, 2021December 31, 2020
Cash and cash equivalents$66,836 $95,117 
Restricted cash495 489 
Total cash, cash equivalents and restricted cash shown in the statement of cash flows$67,331 $95,606 
 June 30, 2020December 31, 2019
Cash and cash equivalents$94,536  $70,467  
Restricted cash11,055  10,972  
Total cash, cash equivalents and restricted cash shown in the statement of cash flows$105,591  $81,439  
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Notes to Condensed Consolidated Financial Statements (Continued)
(Unaudited)
The following table summarizes the Company’s unrealized gains and losses related to its short-term investments in marketable securities designated as available-for-sale (in thousands):

As of June 30, 2020As of December 31, 2019 As of June 30, 2021As of December 31, 2020
Amortized CostGross Unrealized GainsGross Unrealized LossFair ValueAmortized CostGross Unrealized GainsGross Unrealized LossFair Value Amortized CostGross Unrealized GainsGross Unrealized LossFair ValueAmortized CostGross Unrealized GainsGross Unrealized LossFair Value
Marketable securities:Marketable securities:        Marketable securities:        
Money market fundsMoney market funds$7,665  $—  $—  $7,665  $7,638  $—  $—  $7,638  Money market funds$27,672 $$$27,672 $27,669 $$$27,669 
Reported as:Reported as:        Reported as:        
Short-term investmentsShort-term investments$7,665  $7,638  Short-term investments$27,672 $27,669 
 
As of June 30, 20202021 and December 31, 2019,2020, maturities of marketable securities were less than 1one year.There were 0 realized gains and losses on the sale of marketable securities during the three and six months ended June 30, 20202021 and 2019.2020. The Company did 0t recognize any impairment losses on its marketable securities during the three and six months ended June 30, 20202021 or 2019.2020. As of June 30, 2020,2021, the Company did 0t have any investments in marketable securities that were in an unrealized loss position for a period in excess of 12 months.
Note 5. Fair value disclosures
Assets and Liabilities Measured at Fair Value on a Recurring Basis
The following table presents the Company's assets that are measured at fair value on a recurring basis (in thousands):
 As of June 30, 2021As of December 31, 2020
 Level 1Level 2Level 3TotalLevel 1Level 2Level 3Total
Assets        
Short-term investments:
Money market funds$27,672 $$$27,672 $27,669 $$$27,669 
Other long-term assets:
Mutual funds held in Rabbi Trust$834 $$$834 $810 $$$810 

 As of June 30, 2020As of December 31, 2019
 Level 1Level 2Level 3TotalLevel 1Level 2Level 3Total
Assets        
Short-term investments:
Money market funds$7,665  $—  $—  $7,665  $7,638  $—  $—  $7,638  
Other long-term assets:
Mutual funds held in Rabbi Trust$630  $—  $—  $630  $616  $—  $—  $616  
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Notes to Condensed Consolidated Financial Statements (Continued)
(Unaudited)
 
The Company offers a Non-Qualified Deferred Compensation Plan (“NQDC Plan”) to a select group of its highly compensated employees. The NQDC Plan provides participants the opportunity to defer payment of certain compensation as defined in the NQDC Plan. A Rabbi Trust has been established to fund the NQDC Plan obligation, which was fully funded at June 30, 2020.2021. The assets held by the Rabbi Trust are substantially in the form of exchange traded mutual funds and are included in the Company’s other long-term assets on its condensed consolidated balance sheets as of June 30, 20202021 and December 31, 2019.2020.
There were 0 liabilities that are measured at fair value on a recurring basis as of June 30, 2020.2021.
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis
As of June 30, 20202021 and December 31, 20192020 the Company had 0 assets or liabilities required to be measured at fair value on a nonrecurring basis. 
Assets and Liabilities Not Measured at Fair Value 
The carrying values of accounts receivable, accounts payable and short-term borrowings approximate their fair values due to the short-term nature and liquidity of these financial instruments.  
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Notes to Condensed Consolidated Financial Statements (Continued)
(Unaudited)
Note 6. Asset Sale
NeoRussia
In December 2018, the Company entered into an agreement with Joint Stock Company Rusnano, a related party, for Joint Stock Company Rusnano group to purchase the 100% interest in the operations of NeoPhotonics Corporation, LLC, the Company's manufacturing operations in Russia. In 2018, the Company recorded additional restructuring expense of $1.6 million related to these operations, bringing the total amount accrued for the Rusnano payment derivative to $2.0 million. As of December 31, 2018, the Company had recorded assets with a carrying value of $3.0 million as held for sale. The balance for liabilities held for sale as of December 31, 2018 was immaterial.
In April 2019, the Company completed the sale of 100% interest in the operations of NeoPhotonics Corporation, LLC, the Company's manufacturing operations in Russia to Joint Stock Company Rusnano, a related party. In connection with the sale, the Company received $2.0 million in cash, settled the $2.0 million exit fee and recognized a gain on asset sale of $0.9 million within operating expenses during 2019.
APAT
In January 2017, the Company completed the sale of its Low Speed Transceiver Products’ assets to APAT Optoelectronics Components Co., Ltd. ("APAT OE") pursuant to an asset purchase agreement dated December 14, 2016 for consideration of approximately $25.0 million (in RMB equivalent) plus approximately $1.4 million (in RMB equivalent) post-closing transaction service fees to be received under a transition services agreement with APAT OE in which the Company provided short-term manufacturing and other specific services pursuant to such agreement. The related supply chain purchase commitments and value-added tax obligations were assumed by APAT OE. The receivable and payable balances related to the transition service arrangement were $11.7 million and $11.8 million, respectively, as of June 30, 2020.
As of December 31, 2016, the balance in assets held for sale was $13.9 million, consisting of $13.1 million in inventories and $0.8 million in property, plant and equipment. As a result of post-closing adjustments, total consideration was reduced by approximately $3.4 million for inventory. In addition, an immaterial amount of property, plant and equipment was reclassified from assets held for sale. Upon closing, assets sold to APAT OE were approximately $12.8 million, including approximately $12.1 million in inventories and $0.7 million in property, plant and equipment. The adjusted consideration received of approximately $21.6 million was subject to further reduction of up to $10.0 million for any indemnification claims. As of June 30, 2020, the Company has a reserve of $6.6 million within accrued and other current liabilities for warranty claims. The indemnification warranties expired on June 30, 2017. The Company recognized a $2.2 million gain on the sale of these assets in 2017.
All of the Low Speed Transceiver Products were part of the Company’s Network Products and Solutions product group and included the low speed optical network (PON) products for which the end-of-life plan was announced in mid-2016.
Note 7.6. Balance sheet components 
Accounts receivable, net
Accounts receivable, net, consists of the following (in thousands):
 June 30, 2021December 31, 2020
Accounts receivable$47,806 $45,277 
Allowance for doubtful accounts(43)(45)
 $47,763 $45,232 

 June 30, 2020December 31, 2019
Accounts receivable$61,471  $68,988  
Trade notes receivable—  156  
Allowance for doubtful accounts(248) (254) 
 $61,223  $68,890  
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Notes to Condensed Consolidated Financial Statements (Continued)
(Unaudited)
Inventories
Inventories
Inventories consist of the following (in thousands): 

June 30, 2020December 31, 2019 June 30, 2021December 31, 2020
Raw materialsRaw materials$24,418  $19,350  Raw materials$24,523 $25,620 
Work in processWork in process14,237  12,262  Work in process11,695 9,196 
Finished goods(1)
Finished goods(1)
11,794  15,318  
Finished goods(1)
8,123 12,085 
$50,449  $46,930   $44,341 $46,901 


(1)Finished goods inventory at customer vendor managed inventory locations was $2.4$2.2 million and $1.6$1.7 million as of June 30, 20202021 and December 31, 2019,2020, respectively.
Prepaid expenses and other current assets
Prepaid expenses and other current assets consist of the following (in thousands):

 June 30, 2020December 31, 2019
Transition services agreement receivable (refer to Note 6)$11,709  $11,861  
Prepaid taxes and taxes receivable5,301  6,979  
Receivables due from suppliers8,935  4,147  
Deposits and other prepaid expenses2,791  2,512  
Other receivable532  352  
 $29,268  $25,851  
Purchased intangible assets
Purchased intangible assets consist of the following (in thousands): 
 June 30, 2021December 31, 2020
Transition services agreement receivable (refer to Note 11)$$5,933 
Prepaid taxes and taxes receivable3,207 6,137 
Receivables due from suppliers8,030 4,891 
Deposits and other prepaid expenses2,705 2,417 
Other receivable365 795 
 $14,307 $20,173 

 June 30, 2020December 31, 2019
 Gross
Assets
Accumulated
Amortization
Net
Assets
Gross
Assets
Accumulated
Amortization
Net
Assets
Technology and patents$36,716  $(35,746) $970  $36,880  $(35,555) $1,325  
Customer relationships15,021  (15,021) —  15,089  (15,089) —  
Leasehold interest1,205  (404) 801  1,222  (396) 826  
 $52,942  $(51,171) $1,771  $53,191  $(51,040) $2,151  
Amortization expense relating to technology and patents and the leasehold interest intangible assets is included within cost of goods sold and customer relationships within operating expenses. The following table presents details of the amortization expense of the Company’s purchased intangible assets as reported in the condensed consolidated statements of operations (in thousands):

 Three Months Ended
June 30,
Six Months Ended
June 30,
 2020201920202019
Cost of goods sold$184  $184  $368  $368  
Operating expenses—  —  —  119  
Total$184  $184  $368  $487  
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Notes to Condensed Consolidated Financial Statements (Continued)
(Unaudited)
Purchased intangible assets, net
Purchased intangible assets, net, consist of the following (in thousands):
 June 30, 2021December 31, 2020
 Gross
Assets
Accumulated
Amortization
Net
Assets
Gross
Assets
Accumulated
Amortization
Net
Assets
Technology and patents$37,778 $(37,485)$293 $37,637 $(37,021)$616 
Customer relationships15,484 (15,484)15,487 (15,487)
Leasehold interest1,318 (472)846 1,304 (452)852 
 $54,580 $(53,441)$1,139 $54,428 $(52,960)$1,468 
For the three months ended June 30, 2021 and 2020, amortization expense relating to technology and patents is included within cost of goods sold and totaled $0.2 million in each period. For the six months ended June 30, 2021 and 2020, amortization expense relating to technology and patents is included within cost of goods sold and totaled $0.3 million and $0.4 million, respectively.
The estimated future amortization expense of purchased intangible assets as of June 30, 2020,2021, was as follows (in thousands): 

2020 (remaining six months)$368  
2021644  
202227  
202327  
202427  
Thereafter678  
 $1,771  

2021 (remaining six months)$300 
202210 
202310 
202410 
202510 
Thereafter799 
 $1,139 
Accrued and other current liabilities
Accrued and other current liabilities consist of the following (in thousands): 

June 30, 2020December 31, 2019 June 30, 2021December 31, 2020
Employee-relatedEmployee-related$16,298  $17,877  Employee-related$12,471 $19,656 
Transition services agreement payables (refer to Note 6)11,760  11,765  
Asset sale related warranty claims (refer to Note 6)6,568  6,664  
Transition services agreement payables (refer to Note 11)Transition services agreement payables (refer to Note 11)823 9,708 
Operating lease liabilities, currentOperating lease liabilities, current2,108  2,086  Operating lease liabilities, current2,429 2,128 
Income and other taxes payableIncome and other taxes payable1,359  2,036  Income and other taxes payable1,734 1,590 
Accrued warrantyAccrued warranty1,617  712  Accrued warranty903 1,111 
Other accrued expensesOther accrued expenses5,644  6,341  Other accrued expenses7,101 7,860 
$45,354  $47,481   $25,461 $42,053 
Warranty accrual
The table below summarizes the movement in the warranty accrual, which is included in accrued and other current liabilities (in thousands):
 Three Months Ended
June 30,
Six Months Ended
June 30,
 2021202020212020
Beginning balance$1,096 $749 $1,111 $712 
Warranty accruals1,011 65 1,236 
Settlements(197)(143)(273)(331)
Ending balance$903 $1,617 $903 $1,617 

 Three Months Ended
June 30,
Six Months Ended
June 30,
 2020201920202019
Beginning balance$749  $739  $712  $672  
Warranty accruals1,011  161  1,236  476  
Settlements(143) (149) (331) (397) 
Ending balance$1,617  $751  $1,617  $751  

1714

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Notes to Condensed Consolidated Financial Statements (Continued)
(Unaudited)
Other noncurrent liabilities 
Other noncurrent liabilities consist of the following (in thousands): 

 June 30, 2021December 31, 2020
Pension and other employee-related$3,585 $3,844 
Asset retirement obligations3,849 3,810 
Transition services agreement payables (See Note 11)823 
Deferred income tax liabilities507 501 
Government grant505 606 
 $8,446 $9,584 
 June 30, 2020December 31, 2019
Pension and other employee-related$3,977  $4,125  
Asset retirement obligations3,780  3,529  
Deferred income tax liabilities2,064  528  
Government grant1,006  1,380  
Other—  52  
 $10,827  $9,614  
Note 7. Restructuring Charges
Restructuring charges
On August 17, 2020, BIS increased restrictions on Huawei and its affiliates on the Entity List related to items produced domestically and abroad that use U.S. technology or software and imposed additional requirements for items subject to its export control authority. The Company announced on October 5, 2020, that it will manage the business without relying on future revenue contributions from Huawei. As a result, the Company initiated certain restructuring actions to reduce operating expenses and manufacturing costs while maintaining the Company's focus on its core capabilities, including its lasers, coherent components and solutions for data center interconnect and high speed communications networks. Under the restructuring actions, the Company estimates it will incur severance and related charges of approximately $1.3 million and is expected to be completed by the fourth quarter of 2021.
A summary of the current period activity in accrued restructuring costs is as follows (in thousands):
Employee SeveranceOtherTotal
Restructuring obligations December 31, 2020$97 $42 $139 
Charges136 136 
Cash payments(64)(42)(106)
Restructuring obligations June 30, 2021$169 $$169 

For the three and six months ended June 30, 2021, restructuring charges included within cost of goods sold totaled $0.1 million in each period.
15

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Notes to Condensed Consolidated Financial Statements (Continued)
(Unaudited)
Note 8. Debt 
The table below summarizes the carrying amounts and weighted average interest rates of the Company’s debt (in thousands, except percentages):  
 June 30, 2020December 31, 2019
 Carrying
Amount
Interest
Rate
Carrying
Amount
Interest
Rate
Long-term debt, current and noncurrent:    
Borrowing under Wells Fargo Credit Facility$22,780  2.37 %$27,329  3.72 %
Mitsubishi Bank loans8,331  1.05% -1.45%9,255  1.04%-1.44%
Mitsubishi Bank and Yamanashi Chuo Bank loan5,351  1.07 %5,868  1.07 %
Total long-term debt36,462  42,452  
Finance lease liability
233  275  
Unaccreted discount and issuance costs(377)  (446)  
Total long-term debt, net of unaccreted discount and issuance costs$36,318   $42,281   
Reported as:    
Current portion of long-term debt$3,083   $3,044   
Long-term debt, net of current portion33,235   39,237   
Total long-term debt, net of unaccreted discount and issuance costs$36,318   $42,281   
 June 30, 2021December 31, 2020
 Carrying
Amount
Interest
Rate
Carrying
Amount
Interest
Rate
Long-term debt, current and noncurrent:    
Borrowing under Wells Fargo Credit Facility$20,341 1.93 %$21,030 2.01 %
Mitsubishi Bank loans6,167 1.07% -1.47%7,662 1.05%-1.45%
Mitsubishi Bank and Yamanashi Chuo Bank loan4,112 1.07 %5,002 1.07 %
Total long-term debt30,620 33,694 
Finance lease liability141 189 
Total long-term debt30,761 33,883 
Unaccreted discount and issuance costs(240) (324) 
Total long-term debt, net of unaccreted discount and issuance costs$30,521  $33,559  
Reported as:    
Current portion of long-term debt$3,033  $3,232  
Long-term debt, net of current portion27,488  30,327  
Total debt, net of unaccreted discount and issuance costs$30,521  $33,559  
Notes payable and short-term borrowing 
On June 17, 2021, NeoPhotonics (China) Co., Ltd., ("NeoPhotonics China"), a subsidiary of the Company, entered into a credit line agreement with Shanghai Pudong Development Bank Shenzhen Branch (“SPDB”) providing for a line of credit to NeoPhotonics China in an amount of RMB 120,000,000 (approximately $18.6 million) for short-term loans at varying interest rates.
On June 17, 2021, NeoPhotonics Dongguan Co., Ltd (“NeoPhotonics Dongguan”), also a subsidiary of the Company, entered into a credit line agreement with SPDB providing for a line of credit to NeoPhotonics Dongguan in an amount of RMB 30,000,000 (approximately $4.6 million) for short-term loans at varying interest rates.
These two agreements have superseded the previous credit line agreements entered into by NeoPhotonics China and NeoPhotonics Dongguan, respectively, with SPDB, and expire in February 2022.
The Company regularly issues notes payable to its suppliers in China. These notes are supported by non-interest bearing bank acceptance drafts issued under the Company’s existing line of credit facilities and are due three to six months after issuance. As a condition of the notes payable arrangements, the Company is required to keep a compensating balance at the issuing banks that is a percentage of the total notes payable balance until the amounts are settled. As of June 30, 2020, the Company’s subsidiary in China had 2 line of credit facilities with the following banking institutions:
Under the first line of credit facility with Shanghai Pudong Development Bank, the Company can borrow up to RMB 120.0 million ($17.0 million) for short-term loans at varying interest rates, or up to approximately RMB 240.0 million ($33.9 million) for bank acceptance drafts (with up to 50% compensating balance requirement). This line of credit facility expires in November 2021. In November 2017, the Company borrowed $17.0 million under this line which bore interest at 4.1%. The amount of $17.0 million under this line was repaid in May 2018.
Under the second line of credit facility with Shanghai Pudong Development Bank, which expires in November 2021, the Company can borrow up to RMB 30.0 million ($4.2 million) for short-term loans at varying interest rates, or up to approximately RMB 60.0 million ($8.5 million) for bank acceptance drafts (with up to 50% compensating balance requirement).
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Notes to Condensed Consolidated Financial Statements (Continued)
(Unaudited)
Under these line of credit facilities, thethere were 0 bank acceptance drafts issued at June 30, 2021 and December 31, 2020.
As of June 30, 2021 and December 31, 2020, there were no non-interest bearing bank acceptance drafts issued in connection with the Company’sour notes payable to itsour suppliers in China hadunder these line of credit facilities. There were 0 outstanding balance at June 30, 2020 and December 31, 2019.
As of June 30, 2020 and December 31, 2019, compensating balances relating to these bank acceptance draftscredit facilities as of June 30, 2021 and letters of credit issued to suppliers and the Company’s subsidiaries totaled $2.5 million.December 31, 2020, respectively. Compensating balances are classified as restricted cash on the Company’s condensed consolidated balance sheets.
In China, when there is a case pending in judicial court, banks may choose to limit borrowing against existing credit lines, regardless of the legitimacy of the case. The Company has a dispute pending with APAT OE in judicial court (Refer to Note 11). The Company has repaid funds borrowed and does not expect to make any additional draws against its credit facilities in China until this matter is resolved.
Credit facilities
In September 2017,On June 29, 2021, the Company entered into a revolving line of credit agreementan Amended and Restated Credit Agreement (the “A&R Credit Agreement”) with Wells Fargo Bank, National Association ("Wells Fargo"), as the administrative agent for a lender group (the "Wells Fargo. The A&R Credit Facility" orAgreement amends and restates in full that certain Credit Agreement dated as of September 8, 2017 (as amended, the "Former Credit Agreement"), by and among the Company and Wells Fargo. The A&R Credit Agreement provides for continuation of the $50 million revolving credit facility (the "Credit Facility"). Prior to the signing of the A&R Credit Agreement, the Company had drawn $21 million under the Former Credit Agreement, which amount was rolled over and is now treated as outstanding under the Credit Facility.
The Wells Fargo Credit Facility provides for borrowings equal to the lower of (a) a maximum revolver amount of $50.0 million, or (b) an amount equalup to 80% - 85%90% of eligible accounts receivable plus 100% of qualified cash balances up to $15.0 million, less certain discretionary adjustments ("Borrowing Base"). The maximum revolver amount may be increased by up to $25.0 million, subject to certain conditions.
16

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Notes to Condensed Consolidated Financial Statements (Continued)
(Unaudited)
The Credit Facility matures on June 30, 20222026 and borrowings bear interest, at the Company's options, at an interest rate option of either (a) the LIBOR rate, plus an applicable margin ranging from 1.50% to 1.75% per annum, based upon the average excess availability (as defined in the Credit Facility), or (b) the prime lending rate, plus an applicable margin ranging from 0.50% to 0.75% per annum.annum, based upon the average excess availability. The Company is also required to pay a commitment fee equal to 0.25% of the unused portion of the Credit Facility.Facility, monthly, in arrears.
The Credit Facility agreement ("Agreement") requires a mandatory prepayment of the borrowings to the extent the outstanding balance is greater than the lesser of (a) the most recently calculated Borrowing Base, or (b) the maximum revolver amount. The Company is required to maintain a combination of certain defined cash balances and unused borrowing capacity under the Credit Facility of at least $20.0 million, of which at least $5.0 million shall include unused borrowing capacity. The Agreement also restricts the Company's ability to dispose of assets, to permit change in control, merge or consolidate, make acquisitions, incur indebtedness, grant liens, make investments and make certain restricted payments. Borrowings under the Credit Facility are collateralized by substantially all of the Company's assets.
On June 14, 2019, the Company entered into a First Amendment to the Credit Facility (the "Amended Credit Facility"). The Amendment removes Huawei from the list of “Eligible Accounts” as a basis for the Company’s borrowing while Huawei is on the U.S. Bureau of Industry and Security (“BIS”) “Entity List”. During the period of time while Huawei remains on the Entity List, the concentration limits of certain other customers are increased to partially offset the removal of Huawei. Additionally, until Huawei is no longer on the Entity List, the Company is required to maintain a temporary combination of certain defined unrestricted cash and unused borrowing capacity under the Credit Facility of at least $30.0 million in the U.S. and $40.0 million world-wide, of which at least $5.0 million shall include unused borrowing capacity. In May 2020, Fiberhome Technologies Group and certain affiliates ("Fiberhome") was added to the BIS entity list and is also excluded from the Borrowing Base.
The Company was in compliance with the covenants of this Amendedthe Credit Facility as of June 30, 20202021 and December 31, 2019.2020 (under the terms of the Former Credit Agreement). As of June 30, 2020,2021, the outstanding balance under the Credit Facility was $22.8$20.3 million and the weighted average rate under the LIBOR option was 2.37%1.93%. The remaining borrowing capacity as of June 30, 20202021 was $6.6$14.0 million, of which $5.0 million is required to be maintained as unused borrowing capacity. The Company repaid $1.0 million in March 2020, and repaid $4.0 million during the second quarter of 2020. Furthermore, the Company repaid $5.0 million in January 2019, which was borrowed in December 2018. 
During the three months ended June 30, 2020, $0.22021, $0.1 million of accrued interest was rolled intoincluded as a component of the principal amount of Wells Fargo Credit Facility.
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Notes to Condensed Consolidated Financial Statements (Continued)
(Unaudited)
Mitsubishi Bank loans
On February 25, 2015, the Company entered into certain loan agreements and related agreements with MUFG Bank, Ltd. (the “Mitsubishi Bank”) that provided for (i) a term loan in the aggregate principal amount of 500.0 million JPY ($4.4 million) (the “Term Loan A”) and (ii) a term loan in the aggregate principal amount of 1000000000 JPY (approximately $9.3$9.0 million) (the “Term Loan B” and together with the Term Loan A, the “2015 Mitsubishi Bank Loans”). The 2015 Mitsubishi Bank Loans are secured by a mortgage on certain real property and buildings owned by the Company’s Japanese subsidiary. Interest on the 2015 Mitsubishi Bank Loans accrues and is paid monthly based upon the annual rate of the monthly Tokyo Interbank Offer Rate (TIBOR)("TIBOR") plus 1.40%. The Term Loan A required interest only payments until the maturity date of February 23, 2018, with a lump sum payment of the aggregate principal amount on the maturity date. The Term Loan B requires equal monthly payments of principal equal to 8.3 million JPY (approximately $0.1 million) until the maturity date of February 25, 2025, with a lump sum payment of the balance of 8.4 million JPY (approximately $0.1 million) on the maturity date. Interest on the Term Loan B is accrued based upon monthly TIBOR plus 1.40% and is secured by real estate collateral. In conjunction with the execution of the Bank Loans, the Company paid a loan structuring fee, including consumption tax, of 40.5 million JPY (approximately $0.4 million). The Term Loan A of 500.0 million JPY (approximately $4.4 million) was repaid to the Mitsubishi Bank in January 2018.
The 2015 Mitsubishi Bank Loans contain customary representations and warranties and customary affirmative and negative covenants applicable to the Company’s Japanese subsidiary, including, among other things, restrictions on cessation in business, management, mergers or acquisitions. The 2015 Mitsubishi Bank Loans contain financial covenants relating to minimum net assets, maximum ordinary loss and a coverage ratio covenant. The Company was in compliance with the related covenants as of June 30, 20202021 and December 31, 2019.2020. Outstanding principal balance for the Mitsubishi Term Loans was 466.7366.7 million JPY (approximately $4.3$3.3 million) as of June 30, 2020.2021.
In March 2017, the Company entered into a loan agreement and related agreements with the Mitsubishi Bank for a term loan of 690.0 million JPY (approximately $6.4$6.2 million) (the “2017 Mitsubishi Bank Loan”) to acquire manufacturing equipment for its Japanese subsidiary. This loan is secured by the manufacturing equipment owned by the Company's subsidiary in Japan. Interest on the 2017 Mitsubishi Bank Loan is based on the annual rate of the monthly TIBOR rate plus 1.00%. The 2017 Mitsubishi Bank Loan matures on March 29, 2024 and requires monthly interest and principal payments over 72 months commencing in April 2018. The loan contains customary covenants relating to minimum net assets, maximum ordinary loss and a coverage ratio covenant. The Company was in compliance with these covenants as of June 30, 20202021 and December 31, 2019.2020. The loan was available from March 31, 2017 to March 30, 2018 and 690.0 million JPY (approximately $6.4$6.2 million) under this loan was fully drawn in March 2017. Outstanding principal balance for the 2017 Mitsubishi Bank Loan was approximately 431.3316.3 million JPY (approximately $4.0$2.9 million) as of June 30, 2020.2021. 
Mitsubishi Bank and Yamanashi Chuo Bank loan
In January 2018, the Company entered into a term loan agreement with Mitsubishi Bank and The Yamanashi Chuo Bank, Ltd. for a term loan in the aggregate principal amount of 850.0 million JPY (approximately $7.9$7.7 million) (the “Term Loan C”). The purpose of the Term Loan C is to obtain machinery for the core parts of the manufacturing line and payments for related expenses by the Company's subsidiary in Japan. The Term Loan C requires no additional security. The Term Loan C was available from January 29, 2018 to January 29, 2025. The full amount of the Term Loan C was drawn in January 2018. Interest on the Term Loan C is based upon the annual rate of the three months TIBOR rate plus 1.00%. The Term Loan C requires quarterly interest payments, along with the principal payments, over 82 months commencing in April 2018. The Term Loan C loan agreement contains customary representations and warranties and customary affirmative and negative covenants applicable to the Japanese Subsidiary, including, among other things, restrictions on cessation in business, management, mergers or acquisitions. The Term Loan C loan agreement contains financial covenants relating to minimum net assets and maximum ordinary loss. The Company was in compliance with these covenants as of June 30, 20202021 and December 31, 2019.2020. Outstanding principal balance for the Mitsubishi Bank and Yamanashi Chuo Bank Loan was approximately 576.8455.4 million JPY (approximately $5.4$4.1 million) as of June 30, 2020.2021.
2017

Table of Contents
Notes to Condensed Consolidated Financial Statements (Continued)
(Unaudited)
As of June 30, 2020,2021, maturities of total long-term debt were as follows (in thousands):

2020 (remaining six months)$1,561  
20213,121  
2021 (remaining six months)2021 (remaining six months)$1,616 
2022202225,901  20223,080 
202320233,121  20233,037 
202420242,321  20242,260 
20252025427 
ThereafterThereafter437  Thereafter20,341 
$36,462   $30,761 

18

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Notes to Condensed Consolidated Financial Statements (Continued)
(Unaudited)
Note 9. Leases 
The Company has operating leases for offices, research and development facilities and manufacturing facilities. Leases have remaining terms of one year to seven years, some of which include options to extend the leases and some of which may include options to terminate the leases within one year. As of June 30, 20202021 and December 31, 2019,2020, an asset recorded in property, plant and equipment under a finance lease was immaterial.
The components of lease expense were as follows (in thousands):
Three Months Ended
June 30,
Six Months Ended
June 30,
2021202020212020
Operating lease cost$782 $757 $1,556 $1,516 
Variable and short-term lease cost671 495 1,300 898 
Total lease cost$1,453 $1,252 $2,856 $2,414 
Three Months Ended
June 30,
Six Months Ended
June 30,
2020201920202019
Operating lease cost$757  $756  $1,516  $1,510  
Variable and short-term lease cost495  313  898  661  
Total lease cost$1,252  $1,069  $2,414  $2,171  
Other information related to leases was as follows (in thousands, except lease term and discount rate):
Six Months Ended
June 30,
20212020
Supplemental cash flow information
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases$1,680 $1,546 
Weighted average remaining lease term
Operating leases5.9 years7.0 years
Weighted average discount rate
Operating leases6.3 %6.5 %
Six Months Ended
June 30,
20202019
Supplemental cash flow information
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases$1,546  $1,814  
Right-of-use assets obtained in exchange for lease obligations:
Operating leases$—  $136  
Weighted average remaining lease term
Operating leases7.0 years7.7 years
Weighted average discount rate
Operating leases6.5 %6.4 %
21

Table of Contents
Notes to Condensed Consolidated Financial Statements (Continued)
(Unaudited)
Future minimum lease payments under non-cancelable leases as of June 30, 20202021 were as follows (in thousands):
Operating Leases
2020 (remaining six months)$1,596  
20213,095  
20223,091  
20233,041  
20242,943  
Thereafter8,261  
Total future minimum lease payments22,027  
Less imputed interest(4,448) 
Total$17,579  
Operating Leases
2021 (remaining six months)$1,713 
20223,469 
20233,448 
20243,345 
20253,422 
Thereafter5,407 
Total future minimum lease payments20,804 
Less imputed interest(3,588)
Total$17,216 

As of June 30, 2021 and December 31, 2020, the future minimum lease payments are captured in the Company's Consolidated Balance Sheets as follows:
Operating Leases:June 30, 2020December 31, 2019
Accrued and other current liabilities$2,108  $2,086  
Operating lease liabilities, noncurrent15,471  16,543  
Total$17,579  $18,629  

Operating Leases:June 30, 2021December 31, 2020
Accrued and other current liabilities$2,429 $2,128 
Operating lease liabilities, noncurrent14,787 14,522 
Total$17,216 $16,650 
Note 10. Japan pension plan 
The pension liability related to the Company’s Retirement Allowance Plan (“RAP”) in Japan as of June 30, 20202021 was $3.6$3.3 million, of which $0.2$0.5 million was recorded in accrued and other current liabilities and the remainder in other noncurrent liabilities on the Company’s condensed consolidated balance sheet. The pension liability related to the Company’s RAP in Japan as of December 31, 20192020 was $4.1$3.7 million, of which $0.6$0.7 million, was recorded in accrued and other current liabilities and the remainder in other noncurrent liabilities on the Company’s condensed consolidated balance sheet. 
19

Table of Contents
Notes to Condensed Consolidated Financial Statements (Continued)
(Unaudited)
Net periodic pension cost associated with this plan was immaterial in the three and six months ended June 30, 20202021 and 2019.2020.  
Note 11. Commitments and contingencies
Litigation
From time to time, the Company is subject to various claims and legal proceedings, either asserted or unasserted, that arise in the ordinary course of business. The Company accrues for legal contingencies if the Company can estimate the potential liability and if the Company believes it is probable that the case will be ruled against it. If a legal claim for which the Company did not accrue is resolved against it, the Company would record the expense in the period in which the ruling was made. The Company believes that the likelihood of an ultimate amount of liability, if any, for any pending claims of any type (alone or combined), except for the matter discussed in the following paragraph, that will materially affect the Company’s financial position, results of operations or cash flows is remote. The ultimate outcome of any litigation is uncertain, however, and unfavorable outcomes could have a material negative impact on the Company’s financial condition and operating results. Regardless of outcome, litigation can have an adverse impact on the Company because of defense costs, negative publicity, diversion of management resources and other factors.

In January 2010, Finisar Corporation or Finisar (acquired by II-VI, Inc. in September 2019) ("Finisar"), filed a complaint in the U.S. District Court for the Northern District of California, or the Court, against Source Photonics, Inc., MRV Communications, Inc., Oplink Communications, Inc. and the Company, or collectively, the co-defendants. In the complaint, Finisar alleged infringement of certain of its U.S. patents. In 2011 the Company and Finisar agreed to suspend their respective claims and in 2012 the Company and Finisar further agreed to toll their respective claims. While there has been no action on this matter since 2012, the Company is currently unable to predict the outcome of this dispute and therefore cannot determine the likelihood of loss nor estimate a range of possible loss.

22APAT Litigation and Settlement

Table of Contents
Notes to Condensed Consolidated Financial Statements (Continued)
(Unaudited)
InSince April 2018, APAT OE filed a lawsuit in the Qianhai Court in Shenzhen, China againstand NeoPhotonics (China) Co., Ltd. (a wholly-owned subsidiary of the Company located in China) and NeoPhotonics Dongguan Co. Ltd. (collectively "NeoChina"), which are both wholly-owned subsidiaries of the Company) and NeoPhotonics Corporation withwas involved in a claimseries of approximately $20.0 million. The lawsuit relates tolitigations and arbitrations which arose out of the 2017 sale by NeoChina of thecertain low speed transceiver businessassets to APAT OE from NeoChina. APAT OE claims that the business has been losing money and that APAT OE was not given all of the information about the business they purchased prior to signing the Asset Purchase Agreement. In May 2018, counsel on behalf of NeoChina filed a motion objecting to the jurisdiction, claiming that the proper jurisdiction for any dispute between these parties is the Shenzhen Court of International Arbitration (or the "Arbitration Court") and the proper parties to this dispute are NeoChina and APAT OE, pursuant to the Asset Purchase Agreement signed by APAT OE and NeoChina (or the "APA"). In June 2018 a hearing was held in the Qianhai Court in Shenzhen, China and in August 2018 the Court ruled in favor of APAT OE. In October 2018, a hearing was held in the Intermediate Court of Shenzhen (or the "Intermediate Court") on an appeal which was filed by NeoChina and in November 2018 the Intermediate Court ruled in favor of NeoChina and dismissed in totality the litigation against NeoChina, ruling that arbitration was the proper forum for such dispute resolution between the parties. The litigation continued against NeoPhotonics Corporation in Qianhai Court and Intermediate Court, where NeoPhotonics Corporation claims that there is no existing contract between APAT OE and NeoPhotonics Corporation and therefore there is no basis for litigation. In December 2019, NeoPhotonics Corporation received a notice that the case against NeoPhotonics Corporation had been dismissed in the Qianhai Court in Shenzhen, China. APAT OE has appealed this decision to the Shenzhen Intermediate Court. The Company is unable to predict the outcome of this matter and is not currently aware of the precise amount of the ongoing claim by APAT against NeoPhotonics Corporation in this lawsuit.APAT.

On October 27, 2020, the parties entered into a settlement agreement to settle all claims and release all property preservation orders. In December 2018,exchange for a full release of all claims by all parties, terms of the settlement agreement include the following: i) APAT OE filed claims through 2 lawsuits againstto pay NeoChina NeoPhotonics Corporation Limited Hong Kong (or NeoHK), Novel Centennial Limited BVI (or NeoBVI) and NeoPhotonics Corporation (collectively the "defendants") in the Intermediate Court in addition to a pre-trial preservation order. On the same day the Court issued the order to preserve approximately $29.0 million of NeoChina assets, which is the approximate amount of the revised claims by APAT OE against all defendants in the first of the two lawsuits filed in December 2018. In January 2019, there was an additional pre-trial preservation order to preserve approximately $3.8 million of NeoChina assets. The temporary pre-trial preservation order was made simultaneously to the filing of the 2 lawsuits, but the defendants were not served or aware of the lawsuit until later in January 2019. In the first lawsuit, the legal claims are the same as the ones APAT OE filed in April 2018 in Qianhai Court in Shenzhen, China (as described above). The difference is that instead of distributing claims in separate cases, APAT OE has combined its claims to one single case and added the additional defendants of NeoHK and NeoBVI and increased the claimed damages to approximately $29.0 million. In the second lawsuit, the claims are new and related to the alleged new issues related to a contract manufacturer located in the Philippines and claiming damagesarbitration awards in the amount of RMB 50.9 million52,014,519 (approximately $7.6 million). plus interest of RMB 6,122,150 (approximately $0.9 million) for a total amount of RMB 58,136,669 (approximately $8.5 million) and ii) NeoPhotonics Corporation to pay APAT Hong Kong, a wholly-owned subsidiary of APAT OE, claims$10,031,515 plus $500,000 in interest for a total payment $10,531,515 for amounts that were paid by customers to NeoPhotonics Corporation for sales of products made by APAT OE after the defendants have interfered with APAT OE’s ability to sign an engagement agreement withclose of the contract manufacturer. The defendants believe this dispute is related to and should be under the jurisdiction that was agreed to in the APA, and therefore should be properly transferred to the Shenzhen Court of International Arbitration.asset purchase agreement.

On April 30, 2020,In accordance with the Shenzhen Intermediate Court ruled in both lawsuits thatsettlement agreement, the Court has no jurisdiction over disputes between Neo China andfirst payment from APAT OE and that any disputes between those parties should be transferred to the Shenzhen CourtCompany occurred in November 2020. All other payments between the parties, except the final payment, were completed in the first quarter of International Arbitration. Additionally,2021 with the Court ruled that because there is no arbitrationfinal payment by the Company to APAT expected to occur in first quarter of 2022.

The settlement award against Neo China, the Court has no jurisdiction over NeoHK, NeoBVI, or NeoPhotonics Corporation. These rulings are subject to appealof RMB 58,136,669 (approximately $8.5 million) payable by APAT OE andto the Company is unable to predict the outcome of this matter.
In February 2019, NeoChina filed a case in the Qianhai Court in Shenzhen, China against APAT OE and Zhejiang Merchants Property Insurance Company for losses and damages caused to NeoChina from APAT OE’s previously granted property preservation. The claim was for approximately RMB 350,000 (approximately $52,000) in damages and legal fees and was heard in May 2019. In December 2019 NeoChina received a final judgment in favorrepresents repayment of the defendants.
APAT Arbitration
In June 2017, APAT OE filed an arbitration claim in the Shenzhen Court of International Arbitration (or the Arbitration Court) against NeoChina (collectively both of the Company’s China subsidiaries), claiming that approximately $1.5 million of the inventory that was sold to APAT OE by NeoChina in an Asset Purchase Agreement executed between the parties on December 14, 2016 was aged inventory and of no value. The arbitration was heard in the Arbitration Court in August 2017. In October 2017, NeoChina was informed that it was successful in the defense of the dispute and was also successful in its counterclaim against APAT OE. NeoChina was awarded approximately RMB 700,000 (approximately $110,000) in compensatory damages and attorney fees as well as having the approximately $1.5 million claim against it rejected in its entirety.
In April 2018, APAT OE filed a Notice of Judicial Review of the arbitration judgment in the Shenzhen Intermediate Court in Shenzhen, China. The case was heard in May 2018, and NeoChina was successful in disputing the Judicial Review, which means that the arbitration judgment against APAT OE and in favor of NeoChina stands.
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Table of Contents
Notes to Condensed Consolidated Financial Statements (Continued)
(Unaudited)
In July 2018, NeoChina applied togethernet receivables owed to the Shenzhen Intermediate CourtCompany at the settlement date and partial recovery of previously recognized losses incurred by the Company of approximately $3.0 million primarily related to a litigation settlement loss with a vendor for enforcementcommitted purchases of certain production materials for which the previous arbitration ruling because APAT OE had refused to perform the arbitral award. In October 2018, the Court enforced the award, officially closing this arbitration matter.
In July 2018, NeoChina filed an arbitration claim againstliabilities were assumed by APAT OE in the Arbitration Court claiming approximately $12.0 millionAsset Purchase Agreement entered into with the Company in damages as related to liability underDecember 2016 and the APA. NeoChina also was granted a property preservation oflegal fees incurred for the lawsuits with APAT OE’s bank accounts. In FebruaryOE during 2018, 2019 NeoChina applied to the Arbitration Court to reduce the claim to $7.1 million according to the evidence of confirmation requests received by NeoChina. In August 2019, NeoChina applied to the Arbitration Court to modify the claim to $8.1 million subject to the supplementary evidence of NeoChina.
On March 31, 2020, the Arbitration Court ruled in favor of NeoChina and awarded NeoChina 54,607,000 RMB (approximately $7.7 million). On June 12, 2020, the Shenzhen Intermediate Court rejected APAT’s application for review of the arbitration award. Additionally, on April 27, 2020, NeoChina filed an enforcement action in the Intermediate People's Court of Shenzhen Municipality to enforce this arbitration award.2020.

In November 2018,At June 30, 2021, the amount payable by the Company to APAT OE filed an additional arbitration claim against NeoChina claiming approximately $7.8 million for liability under the APA. In March 2019, NeoChina filed a responsesettlement agreement is approximately $0.8 million, and counterclaim againstis included in Accrued and Other Liabilities in the caption "Transition Services Agreement Payable" (See Note 6). APAT OE including a claim for attorney fees inhas repaid the full amount of RMB 810,000 (approximately $121,000). This matter was heard in the same hearingTransition Services Agreement Receivable owed to the Company and there is currently 0 balance remaining as the NeoChina arbitration claim referenced above.

On March 31, 2020, the Arbitration Court ruled in NeoChina's' favor and awarded 846,000 RMB (approximately $119,000) for attorney's fees and arbitration fees. Onof June 12, 2020, the Shenzhen Intermedia Court rejected APAT's application for review of the arbitration award. Additionally, on April 27, 2020, NeoChina filed an enforcement action in the Intermediate People's Court of Shenzhen Municipality to enforce this arbitration award.30, 2021 (See Note 6).

Indemnifications

In the normal course of business, the Company enters into agreements that contain a variety of representations and warranties and provides for general indemnification. The Company’s exposure under these agreements is unknown because it involves claims that may be made against the Company in the future, but have not yet been made. To date, the Company has 0tnot paid any claims or been required to defend any action related to its indemnification obligations. However, the Company may record charges in the future as a result of these indemnification obligations.


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Notes to Condensed Consolidated Financial Statements (Continued)
(Unaudited)
Note 12. Stockholders’ equity 
Common Stock 
As of June 30, 2020,2021, the Company had reserved 9,109,5277,402,846 common stock for issuance under its equity incentive plans and 1,513,0121,156,415 common stock shares for issuance under its employee stock purchase plan.
Accumulated Other Comprehensive Loss
The components of accumulated other comprehensive loss,income (loss), net of related taxes, were as follows (in thousands):
 Foreign Currency Translation AdjustmentsDefined Benefit Pension Plan AdjustmentTotal Accumulated Other Comprehensive Income (Loss)
Balance as of December 31, 2020$1,951 $(216)$1,735 
Other comprehensive loss, net of taxes of 0(312)(312)
Balances at June 30, 2021$1,639 $(216)$1,423 

 Foreign Currency Translation AdjustmentsDefined Benefit Pension Plan AdjustmentTotal Accumulated Other Comprehensive Loss
Balance as of December 31, 2019$7,641  $230  $7,871  
Other comprehensive loss, net of taxes of 01,509  —  1,509  
Balances at June 30, 2020$9,150  $230  $9,380  
No material amounts were reclassified out of accumulated other comprehensive incomeloss during the three and six months ended June 30, 20202021 and 20192020 for realized gains or losses on available-for-sale securities.  
Accumulated Deficit
Approximately $9.2$10.0 million of the Company’s retained earnings within its total accumulated deficit as of December 31, 20192020 was subject to restriction due to the fact that the Company’s subsidiaries in China are required to set aside at least 10% of their respective accumulated profits each year end to fund statutory common reserves.
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Notes to Condensed Consolidated Financial Statements (Continued)
(Unaudited)
Note 13. Restricted net assets
The Company’s consolidated subsidiaries operating in China and Japan are restricted from transferring funds or assets to its parent company in the form of cash dividends, loans or advances. As of June 30, 20202021 and December 31, 2019,2020, the Company's consolidated subsidiaries had $21.1$11.5 million and $11.4 million, respectively, of restricted net assets. This compares to the Company's consolidated net assets of $179.0$157.4 million and $160.2$180.4 million as of June 30, 20202021 and December 31, 2019,2020, respectively, which consisted of (in thousands):

June 30, 2020December 31, 2019 June 30, 2021December 31, 2020
Cash restricted in China as a result of ongoing litigation and unfulfilled government grants$11,019  $10,936  
Cash restricted in China as a result of unfulfilled government grantsCash restricted in China as a result of unfulfilled government grants$458 $452 
China earnings restricted to fund statutory common reserves in ChinaChina earnings restricted to fund statutory common reserves in China9,107  9,240  China earnings restricted to fund statutory common reserves in China10,126 10,010 
Loan agreements in Japan requiring local subsidiaries to maintain minimum net asset levelsLoan agreements in Japan requiring local subsidiaries to maintain minimum net asset levels928  920  Loan agreements in Japan requiring local subsidiaries to maintain minimum net asset levels903 969 
Total restricted net assets in the Company's consolidated subsidiaries Total restricted net assets in the Company's consolidated subsidiaries$21,054  $21,096   Total restricted net assets in the Company's consolidated subsidiaries$11,487 $11,431 

Note 14. Stock-based compensation 
The following table summarizes the stock-based compensation expense recognized in the three and six months ended June 30, 20202021 and 20192020 (in thousands):

Three Months Ended
June 30,
Six Months Ended
June 30,
Three Months Ended
June 30,
Six Months Ended
June 30,
2020201920202019 2021202020212020
Cost of goods soldCost of goods sold$621  $609  $1,158  $1,210  Cost of goods sold$572 $621 $1,120 $1,158 
Research and developmentResearch and development999  787  1,757  1,668  Research and development744 999 1,606 1,757 
Sales and marketingSales and marketing738  599  1,268  1,277  Sales and marketing261 738 815 1,268 
General and administrativeGeneral and administrative1,429  1,010  2,122  2,188  General and administrative763 1,429 2,076 2,122 
$3,787  $3,005  $6,305  $6,343   $2,340 $3,787 $5,617 $6,305 
As of June 30, 20202021 and December 31, 2019,2020, stock-based compensation capitalized in inventories totaled $0.4$0.2 million and $0.3 million, respectively.


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Notes to Condensed Consolidated Financial Statements (Continued)
(Unaudited)
Determining Fair Value 
The Company estimated the fair value of certain stock-based awards using a Black-Scholes-Merton valuation model.
Stock Options and Restricted Stock Units (RSUs)
The following table summarizes the Company’s stock option and RSU activity, excluding market and performance-based RSUs, during the Sixthree and six months ended June 30, 2020:2021: 

Stock OptionsRestricted Stock Units
 Number of
Shares
Weighted
Average
Exercise
Price
Number of
Units
Weighted
Average
Grant Date
Fair Value
Balance as of December 31, 20192,598,745  $5.93  3,170,981  $5.80  
Granted53,760  8.56  1,778,251  7.63  
Exercised/Converted(315,611) 4.27  (597,324) 6.29  
Cancelled/Forfeited(47,516) 10.83  (73,278) 6.24  
Balances at June 30, 20202,289,378  6.12  4,278,630  6.48  
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Notes to Condensed Consolidated Financial Statements (Continued)
(Unaudited)
Stock OptionsRestricted Stock Units
 Number of
Shares
Number of
Units
Balance as of December 31, 20202,096,917 3,621,681 
Granted53,487 89,744 
Exercised/Converted(398,627)(999,459)
Cancelled/Forfeited(17,393)(246,851)
Balances at June 30, 20211,734,384 2,465,115 
At June 30, 2020,2021, the Company had $0.6$0.3 million of unrecognized stock-based compensation expense for stock options, net of estimated forfeitures. At June 30, 2020,2021, the Company had $19.5$11.3 million of unrecognized stock-based compensation expense for RSUs, excluding market and performance-based RSUs, net of estimated forfeitures.
Market-based Restricted Stock Units
As of June 30, 2020,2021, the Company has granted 611,500705,000 shares of market-based RSUs thatand 265,250 shares remain outstanding to certain employees. These RSUs will vest if the 30-day weighted average closing price of the Company's common stock is equal to or greater than certain price targets per share and the recipients remain in continuous service with the Company through such service period. NaNA total of 305,750 market-based RSUs have vested and 93,500134,000 market-based RSUs have been cancelled through June 30, 2020. The weighted average grant-date fair value per share of market-based RSUs granted during 2019 and 2018 was approximately $4.86 and $5.82 per share, respectively.2021. As of June 30, 2020,2021, the Company had $0.8$0.2 million of unrecognized stock-based compensation expense for these RSUs, net of estimated forfeitures, which will be recognized over the remaining weighted-average period of 1 year.forfeitures. The fair value of market-based RSUs was measured on the grant date using Monte Carlo simulation model with the following assumptions:
Assumptions
Used
Weighted-average volatility66%
Risk-free interest rate2.79%
Expected dividends—%0%
Performance-based Restricted Stock Units
In April 2020, the Company granted 90,400 shares of performance-based RSUs to certain employees. These RSUs will vest upon certification by the Board of Directors or the Compensation Committee that the Company has achieved at least $425 million in revenue over four consecutive fiscal quarters and the recipients remain in continuous service with the Company through such service period. NoNaN performance-based RSUs were vested or cancelled during 2020.

The weighted average grant-date fair value per share ofthrough June 30, 2021 and 14,950 performance-based RSUs granted during 2020 was $7.73 per share.have been cancelled through June 30, 2021.
Stock Appreciation Units (SAUs) 
SAUs are liability classified share-based awards. Outstanding SAUs are re-measured each reporting period at fair value until settlement. The Company did 0t grant any SAUs during the three and six months ended June 30, 20202021 or 2019.2020. As of June 30, 20202021 and December 31, 2019,2020, there were 153,404 and 163,471150,000 SAUs outstanding, respectively, and related SAU liabilities were $0.7$0.8 million and $0.8$0.7 million, respectively.  
Employee Stock Purchase Plan (ESPP)
The Company issued 204,199234,587 shares under the ESPP during the three months ended June 30, 2020.2021. As of June 30, 2020,2021, there was $0.2 million of unrecognized stock-based compensation expense for employee stock purchase rights that will be recognized over the remaining offering period through November 2020. In June 2019, the Company adopted an Amendment and Restatement2021. 

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Notes to increase the number of shares authorized for issuance under the ESPP by an additional 1,500,000 shares and to eliminate the annual "'evergreen" automatic increase provisions.  Condensed Consolidated Financial Statements (Continued)
(Unaudited)
2020 Equity Incentive Plan
On June 2, 2020,1, 2021, at the 20202021 Annual Meeting of Stockholders of NeoPhotonics Corporation, the Company’sCompany's stockholders approved NeoPhotonics Corporation 2020 Equity Incentive Plan as amended and restated (the “2020“Amended 2020 Plan”) to increase the number of shares available for the grant of stock options, restricted stock unit awards, and other awards by 900,000 shares . The Amended 2020 Plan became effective immediately upon stockholder approval at the Annual Meeting. TheAfter taking this amendment into account, the aggregate number of shares of common stock reserved for issuance under the Amended 2020 Plan will not exceed the sum of (i) 1,921,4142,821,414 shares and (ii) certain shares subject to outstanding awards granted under the Company’s 2010 Equity Incentive Plan or 2011 Inducement Award Plan that may become available for issuance under the Amended 2020 Plan, as such shares become available from time to time.

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Notes to Condensed Consolidated Financial Statements (Continued)
(Unaudited)
Note 15. Income taxes
The income tax provision forfrom income taxes in the periods presented is based upon the income (loss) before income taxes (in thousands):

 Three Months Ended
June 30,
Six Months Ended
June 30,
 2020201920202019
Income tax provision$(412) $205  $(2,405) $35  
 Three Months Ended
June 30,
Six Months Ended
June 30,
 2021202020212020
Income tax provision$(192)$(412)$(823)$(2,405)
 
The Company’s income tax provision in the three and six months ended June 30, 2021 was primarily related to income taxes on earnings from its foreign tax jurisdictions. The Company’s income tax provision in the three and six months ended June 30, 2020 was due to income taxes on earnings from operations in the U.S. and foreign tax jurisdictions. The Company’s income tax provision in the three and six months ended June 30, 2019 was primarily related to income taxes of the Company’s non-U.S. operations. The increasedecrease in income tax expense for the three and six months ended June 30, 2020,2021, as compared to the same period in 20192020 was primarily due to increaseddecreased earnings from its U.S. operations for the three and six months ended June 30, 2020 while the Company has historically experienced net losses in the U.S.

2021.
The Company conducts its business globally and its operating income is subject to varying rates of tax in the U.S., China and Japan. Consequently, the Company’s effective tax rate is dependent upon the geographic distribution of its earnings or losses and the tax laws and regulations in each geographical region.

Due to historical losses in the U.S., the Company has a full valuation allowance on its U.S. federal and state deferred tax assets. Management continues to evaluate the realizability of deferred tax assets and the related valuation allowance. If management's assessment of the deferred tax assets or the corresponding valuation allowance were to change, the Company would record the related adjustment to income during the period in which management makes the determination.

As of June 30, 2020,2021, there were no material changes to either the nature or the amounts of the uncertain tax positions previously determined for the year ended December 31, 2019.

2020.
On March 27, 2020, the “CoronavirusU.S. enacted the Coronavirus Aid, Relief, and Economic Security Act” (“CARES Act”CARES”) was signed into law. The new legislation includes a number of incomeAct which provided certain tax provisions applicable to individuals and businesses. Due to historical net operating losses incurred inrelief measures. On December 27, 2020, the U.S., enacted the Consolidated Appropriations Act of 2021 (CAA) which extended and expanded certain tax relief measures created by the CARES Act. On March 11, 2021, the U.S. enacted the American Rescue Plan Act didof 2021 (ARPA). These Acts have not havehad a material impactsimpact on the Company’s condensed consolidated financial statements as of June 30, 2020. The Company continuesCompany's operations to examine the elements of the CARES Actdate and the impactsCompany will continue to evaluate the impact they may have, if any, on its future business.


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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS 
 
The following discussion and analysis of our financial condition and results of operations should be read in conjunction with the unaudited condensed consolidated financial statements and the related notes thereto included elsewhere in this Quarterly Report on Form 10-Q for the period ended June 30, 20202021 and the audited consolidated financial statements and notes thereto and management’s discussion and analysis of financial condition and results of operations for the year ended December 31, 20192020 included in our Annual Report on Form 10-K/A.10-K. References to “NeoPhotonics,” “we,” “our,” and “us” are to NeoPhotonics Corporation unless otherwise specified or the context otherwise requires.
This Quarterly Report on Form 10-Q for the period ended June 30, 20202021 contains “forward-looking statements” that involve risks and uncertainties, as well as assumptions that, if they never materialize or prove incorrect, could cause our results to differ materially from those expressed or implied by such forward-looking statements. The statements contained in this Quarterly Report on Form 10-Q for the period ended June 30, 20202021 that are not purely historical are forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Terminology such as “believe,” “may,” “might,” “objective,” “estimate,” “continue,” “anticipate,” “intend,” “should,” “plan,” “expect,” “predict,” “potential,” or the negative of these terms or other similar expressions is intended to identify forward-looking statements.
We have based these forward-looking statements largely on our current expectations and projections about future events and industry and financial trends that we believe may affect our financial condition, results of operations, business strategy and financial needs. Such forward-looking statements are subject to risks, uncertainties and other important factors that could cause actual results and the timing of events to differ materially from future results expressed or implied by such forward-looking statements. Factors that could cause or contribute to such differences include, but are not limited to, those identified in “Part II —Item 1A. Risk Factors” below, and those discussed in the sections titled “Special Note Regarding Forward-Looking Statements” and “Risk Factors” included in our Annual Report on Form 10-K/A10-K for the year ended December 31, 2019,2020, as filed with the SEC on March 3, 2020.February 25, 2021. Furthermore, such forward-looking statements speak only as of the date of this report. Except as required by law, we undertake no obligation to update any forward-looking statements to reflect events or circumstances after the date of such statements.
Overview 
We develop, manufacture and sell lasers and other high speed optoelectronic products that transmit and receive and switch high speedhigh-speed digital optical signals forthat connect the Cloud and hyper-scalehyperscale data center internet content provider and telecom networks. Our solutions help network operators manage the explosive data traffic growth in Cloud and hyper-scale data centers.
We specialize in products that operate at the highest speed over distance, for 100 Gigabits per Second ("G"), 200G, 400G and beyond data rates, such as at 600G and 800G. Our products have the speed, size, low power consumption and interoperability to directly transmit data using industry standard Internet Protocol coding, or IP, over DWDM wavelengths, greatly simplifying data networks.
We are the world's primary supplier of ultra-pure light tunable lasers that emit the ultra-pure light that isare required for the highest speed over distance coherentspeed-over-distance fiber optic communications links. "Cloud" refers to the vast constellation of servers that are located in data centers around the world and which are accessed through the internet, along with the associated software and data bases that run on them and the communications links that interconnect them.

Our products deliver, for each wavelength, 400 Gigabits per Second ("G"), 600G and 800G and beyond data rates. We integrate our lasers and oursell high performance integrated pluggable coherent optical components into transmit/receive modules, or transceivers. Our high speed transceiver modules which can operate up to 400G, drive downdirectly transmit high-speed data using industry standard Internet Protocol ("IP") coding over Dense Wavelength Division Multiplexing ("DWDM"), greatly simplifying data networks, thereby reducing costs extend reach and directly interconnect with switches and routers.power consumption.
We believe we are well positioned to deliver these laser, component and module products based on our leadership in the ultra-pure lasers which power them and our comprehensive capabilities in designing and producing the highest performance Silicon Photonics and Indium Phosphide devices based on our Advanced Hybrid Photonic Integration.
We also believe that because of our laser and component technologies, we have been first to deliver commercial volumes for each of the highest speed advances in components since the advent of coherent optics for transmission ten years ago in 2010, as maximum speeds have advanced for each wavelength, or color, from 100G (Gigabits per second) to 200G, 400G and now 800G. With adoption of coherent transmission using pluggable high speedhigh-speed optical modules in Cloud and hyper-scalehyperscale data centers, we believe our total addressable market is rapidly expanding.

Our highrecently introduced 400ZR and 400ZR+ pluggable transceiver modules enable new, lower cost network architectures using IP over DWDM protocols that addresses new, rapidly expanding major market segments. Such modules can replace a chassis-based line card with the same much smaller form factor as a pluggable client side transceiver, so that interconnects between data centers can be as simple as interconnects within a data center.

Over the past decade we have been first to deliver commercial mass production volumes of coherent optical components for each of the speed advances as maximum speeds per wavelength, or color, have advanced from 100G to 200G, 400G, 600G and now 800G.

We believe that we are well positioned to continue world market leadership in these laser, component and module solutions based on our leadership in the ultra-pure light lasers which power them and our comprehensive technologies for Silicon Photonics, Indium Phosphide Photonic Integrated Circuits ("PICs") and optical ICs.

Our high-speed optical communications technologiesproducts use coherent technology to encode information to optical signals from electronic signals for transmission and to decode it for receiving. We achieve these ultra-highUltra-high speeds withrequire coherent technology that encodes information
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using the phase, amplitude and polarization of an optical wavelength, packing in far more information than simple on/off encoding. We believe that we are a global leader in coherent transmission technology, based on our achieved data rates or speeds, over distance, leadership in ultra-pure color lasers and optical integration for miniaturization and low power consumption.

Coherent transmission is becominghas become the technology of choice for high speed over distance data transmission in Cloud infrastructure and data center interconnection, in addition to telecom networks, where networks. The move to 400G and above transmission speeds is a fulcrum for
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the highest speeds over distance were first developed. Moreover, we areindustry as it marks the most significant producernext major step-up in speed. 400G is becoming the basic building block for network deployments for all distances greater than 40km, all of which require coherent transmission technology.

We sell to virtually all of the pure light lasersleading telecom network equipment companies such as Ciena, Cisco Systems, including its acquisition of Acacia communications, Fiberhome, Fujitsu, Huawei, Infinera, NEC, Nokia and ZTE. Note that deliver data atdue to restrictions imposed by BIS on Huawei, shipments to Huawei and its affiliates were minimal in the highest speeds, as we have delivered more than 1.5 million lasers used by the more than 2 million coherent ports deployed by the industry over the past 10 years (each port may use either one or two lasers).first quarter of 2021.

We have grownbelieve that use cases for 400ZR and 400ZR+ system-level modules will extend across data center interconnect to backhaul for 5G wireless networks and to metro networks. The lower power, higher port density and interoperability of pluggable solutions drive this forecast. These architectures are driven by hyperscale operators and we believe they will be adopted in metro telecom networks using 400ZR+ pluggable modules in areas where reach and density make it the clear economic winner with much lower total costs. Furthermore, we believe that our business by deliveringhigh performance optics combined with next generation digital signal processors ("DSPs") will enable 800ZR and 800ZR+ pluggable modules within the highest speed over distance fornext few years.

We believe that substantially lower costs associated with 400ZR+ pluggable modules will drive the Long Haul and Metro segmentsextension of the Telecom market. In recent years the Data Center Interconnect (DCI) market has become an increasing part of our revenue as DCI market adopts high speed coherent optical technologies.
Until recently our largest customers, Huawei and Ciena, have been suppliersmodules into metro networks through elimination of network equipment primarily focused onproprietary chassis, and reduction in the Telecom market. Other leading customers have also been telecom equipment suppliers, such as Cisco, Nokia and ZTE.number of Reconfigurable Optical Add Drop Multiplexers ("ROADMs") that are required in current network architectures.

Our High Speed Products for data rates of 100G, 200G400G, 600G, 800G and 400Gabove were 90%94% of our revenues for the three months ended June 30, 2020, and were 89% of our revenues in2021 compared to 90% for the three months endedquarter ending June 30, 2019.2020. Our sales concentration in High Speed Products has been increasingincreased each year for more than 10 years.

Networks operating at “High Speed Products” refers to transmitter and receiver products as well as switching and other component products designed for 100G and beyond optical transmission applications. Our high speed 100G and beyond products are based on our Advanced Hybrid Photonic Integration technologies, which support 100 gigabits or more per second of information transmitted over a single channel. Our 400G and beyond data rates have adopted coherent transmission technology because of its ability to increase data rates and lower costs. These high speed networksabove products are among the highest growth segments of the optical communications market, and support the rapid expansion of telecom backbone, hyper-scale data center interconnect content provider networks, accommodating increased wireline and mobile traffic.
We expect growth in the 400G and beyond segment of our business to be driven primarily by increased adoptiona subset of our High Speed Products.

Products in the much larger Cloud infrastructure market, the Metro market sector and in the high speedcapable of data center interconnect, or DCI, market.
Specific technologies have been developed for communications inside the data center and between data centers themselves as well as between data centers and consumers. We believe our solutions are often unique in their ability to provide high integrity signals across longer distances. However, high speed coherent transmission is becoming more competitive at shorter reaches, which include applications where interconnect volumes are much larger, and where we historically have not sold our products directly. Thereby we believe shorter reaches offer us further significant growth opportunities.
We believe the changes atrates of 400G and above data rates portend a coming significant changehave accounted for more than 10% of our revenue since 2018 and have nearly doubled from $44 million in high speed network architectures2019 to more efficiently implement the$86 million in 2020. Revenue from products for 400G and above technologies that we provide. This forecasted sea change is enabled by coherent techniquesapplications was $29.8 million in the quarter ending June 30, 2021 representing 46% of total revenues and Photonic Integrated Circuits, which makes it possible for long distance transmission by pluggable transceiver modules that connect directly into switches and routers inside data centers and that have thus far been used only for short reach connections within data centers. Such disaggregated Open Line Systems can manage optical signals between data centers with all needed channel management, amplification, traffic planning and monitoring functions. Together coherent pluggable transceivers and Open Line fiber systems make IPgrowth of 100% over DWDM possible, that is for Internet Protocol data to be transmitted over long distances on an optical channel without translation into a proprietary equipment manufacturer’s format. Connections between data centers then become as simple as connections within data centers - a breakthrough benefit to the network operator.
second quarter of 2020. We believe that the market for 400G and above products will grow at a 5-year compound annual growth rate of approximately 70 percent through 2024. We therefore expect our 400G and above revenues will continue to grow at an accelerated rate over the next few years, this connection architecture will become a mainstay of new installations, moving a significant portion of the capital expenditures from network equipment supplied DWDM proprietary boxes to disaggregated direct 400ZR interconnections. This new approach of IP over DWDM moves Internet Protocol traffic from switchesimmediate and routers directly over an Open Line system DWDM channel without passing through a proprietary network equipment transmission box. We supply both the 400G pluggable coherent transceivers and optical components for DWDM Line Systems, including Open Line Systems, that provide the filtering and control of the optical signals on the common fiber equipment.longer term.

The Covid-19 pandemic is impactingcontinues to impact our business and the business of our customers and suppliers, andas well as how we execute our business. In January and February, 2020, the focus was the impact from China. Our China operations and China-based supply chain partners executed well and have largely recovered. The focus has now turned to the impact on operations in North America as well as suppliers in the rest of the world.

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Our priorities to address the impacts of Covid-19 on our operations are as follows:

Health and Safety

The health and well-being of our employees and supply chain partners is our top priority.

We have implemented strict measures to ensure and maintain safety, including working remotely where possible social distancing and increased cleaningwith enhanced protocols in each of our global facilities. As local health regulations allow in each of our locations, we are moving toward increased in-office work while maintaining a flexible hybrid approach.

We are closely monitoring rapidly evolving conditions and adhering to local, state and federal guidelines and orders.

Business Continuity

Our operations and products support essential communications networks globally.

We have implemented and continue to adjust comprehensive business continuity plans in response to Covid-19 to ensure that we are able to deliver for our customers and continue to work toward consistent profitability.

customers. We are working closely with our supply chain partners globally to increase inventory levelsensure we have access to critical components, as we see strong demand for our products supporting increased network bandwidth, and buffer supply chain volatility, as our suppliers support the health and safety of their employees.key semiconductor components globally have moved into shortage.

We have seen strong demand in the near term for products that facilitate increasing network bandwidth; we are working to ensure continuity between us, our supply partners and forward to our customers or their contract manufacturing partners around the world.

Financial Structure

We believe that our balance sheet and liquidity position provide the flexibility needed to support our operations during this pandemic.

We have taken and will continue to take precautionary steps, as required, to maintain our financial position to include leveraging available credit facilities, managing operating expenses prudently and deferring non-essential capital expenditures.

planned production ramping.
Our Solutions
Three critical optical components are required to make a coherent transceiver: (1) a laser with a very narrow linewidth for very pure light; (2) a coherent modulator capable of changing both the intensity and phase of the optical signal to code data onto it; and (3) a coherent receiver capable of detecting both the intensity and phase of the received optical signal to “understand” its content, plus an electronic digital signal processor IC (DSP).DSP IC.

We have been a leading volume supplier of these optical components since coherent systems were first deployed in volume for telecommunications networks a decade ago, in 2010. We are now the leading supplier of narrow linewidth tunable lasers and coherent receivers to the coherent market, and we have introduced new high speedhigh-speed coherent modulators for 400G, 600G and above applications. We use our coherent components to design, manufacture and sell complete coherent pluggable transceivers including our 400G QSFP-DD, OSFP and CFP2-DCO modules.
The
Our core capabilities ofin coherent optics continue to grow with increasing photonic integration for higher performance and smaller size, and open further opportunities for us in adjacent markets. Outsidemarkets outside of communications, coherentcommunications. Coherent technology improves sensitivity and performance for a variety ofsuch applications includingas inter-satellite communication links including for low earth orbit (LEO)("LEO") satellites, plussensing for industrial applications, 3D sensingLIDAR for autonomous vehicle navigation, and medical imaging.
In the three months ended June 30, 2020 and 2019, our five largest customers accounted for 82% and 84% of our total revenue, respectively. In the three months ended June 30, 2020, two customers had 10% or more revenue including Huawei Technologies which accounted for 52% of our total revenue. In the three months ended June 30, 2019, two customers had 10% or more revenue including Huawei which accounted for 36% of our total revenue.
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We have invested and expect to continue to invest significant time and capital into our research and development operations. Our research and development activities continue to push the performance leadership boundaries in high speed digital optics, silicon photonics and hybrid photonic integration, optoelectronics control and in signal processing.
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Research and development expenses were $13.7 million and $13.8 million in three months ended June 30, 2020 and 2019, respectively.
We have research and development and wafer fabrication facilities in San Jose and Fremont, California and in Tokyo, Japan that coordinate with our research and development and manufacturing facilities in Dongguan, Shenzhen and Wuhan, China and Ottawa, Canada. We use proprietary design tools and design-for-manufacturing techniques to align our design process with our precision nanoscale, vertically integrated manufacturing and testing. We believe we are one of the highest volume manufacturers of photonic integrated circuits ("PIC") in the world and that we can further expand our manufacturing capacity to meet market needs.
Demand for certain of our High Speed Products that are used in metro and data center interconnect (DCI) applications in North America and Europe increased. DCI deployments in North America were particularly strong in 2019, and our products for these applications were shipped to contract manufacturers for our system manufacturer customers.
On May 16, 2019, the U.S. Commerce Department's Bureau of Industry and Security ("BIS") added Huawei and certain affiliates to the BIS Entity List ("Entity List"), with an effective date of May 21, 2019. This denies Huawei the ability to purchase products, software and technology that are subject to U.S. Export Administration Regulations ("EAR").
Additionally, in May of 2020, BIS added Fiberhome to the Entity List, with an effective date of June 5, 2020. This denies Fiberhome the ability to purchase products, software and technology that are subject to EAR.
We are committed to EAR compliance in each of the locations in which we do business. We determined that certain of our products are not subject to EAR regulations and may be lawfully sold to Huawei and/or Fiberhome. During 2018, prior to the denial order, non-EAR products were over half of our Huawei revenue and shipments to Huawei of many of these products continue. Further, we have applied for licenses for certain technology subject to EAR, and at the time of this filing, we have been granted a license to ship limited, but not material, volumes of U.S.-manufactured lasers to Huawei.Similarly, a significant portion of our shipments to Fiberhome prior to the denial order was determined to not be subject to EAR and shipments of certain of those products have continued.

During the quarter ended June 30, 2020, the Covid-19 pandemic impacted our operations. Operations in China which were affected in the previous quarter have largely returned to normal levels, but there remain risks in our supply chain, which we continue to monitor. In March 2020, as the effects of the outbreak spread to the rest of the world, our operations in North America, along with much of our western customer base, began to operate on a “work from home” basis, which continued into the second quarter. We further idled one production facility in California for a significant portion of the quarter, but resumed operations there by the end of the quarter.In compliance with local health orders requiring lower occupancy, social distancing and enhanced hygiene, some work has resumed in our Silicon Valley facilities.As the date of filing of this Quarterly Report, we have not seen a reduction in demand in China or the west due to the outbreak and we continue to monitor potential supply chain disruptions.

Revenue was $103.2 million in the three months ended June 30, 2020, compared to $81.7 million in the three months ended June 30, 2019 primarily due to volume growth in China and from continued strength from the U.S. and European based customers, including shipments through their off-shore contract manufacturers. Our gross profit was 32.5% of revenue in the three months ended June 30, 2020 compared to 19.2% of revenue in three months ended June 30, 2019. Improvement resulted from favorable product mix, increased volume and cost reductions.

In the three months ended June 30, 2020, High Speed Products represented approximately 90% of total revenue, or $92.9 million and Network Products and Solutions represented approximately 10% of total revenue, or $10.3 million. In the three months ended June 30, 2019 High Speed Products were 89% of total revenue, or $72.9 million and Network Products and Solutions represented approximately 11% of total revenue, or $8.8 million. The High Speed Product market segment is growing at a much faster pace than Network Products and Solutions, demonstrating our continued leadership in 400G and faster solutions to address the merging needs for more network bandwidth capacity by both Cloud players and carrier.In addition, Network Products and Solutions were also disproportionately impacted by the suspension of shipments due to Huawei's placement on the Entity List.
Critical accounting policies and estimates
Other thanWe prepare our condensed consolidated financial statements in accordance with generally accepted accounting principles in the policy changes disclosed in Note 1 in NotesUnited States. The preparation of condensed consolidated financial statements also requires us to Condensed Consolidated Financial Statements in Item 1, Part Imake estimates and assumptions that affect the reported amounts of this Report, thereassets, liabilities, revenues, costs and expenses and related disclosures. We base our estimates on historical experience and on various other assumptions that we believe to be reasonable under the circumstances. Actual results could differ significantly from the estimates made by our management.
There have been no material changes to our critical accounting policies and estimates during the three and six months ended June 30, 2020 from those disclosed in Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations in our Annual Report on Form 10-K/A10-K for the year ended December 31, 2019.2020.
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Results of Operations 
Revenue
Our business is focused on the highest speed digital optics and signal processing communications applications. In the three and six months ended June 30, 2020,2021, our High Speed Products for data rates of 100G and beyond comprised 90% of our revenues.94% in each period.
We sell substantially all of our products to original equipment manufacturers ("OEMs") and their contract manufacturers. Revenue is recognized upon transfer of control of the product to the buyer. We price our products based on market and competitive conditions and may periodically reduce the price of our products as market and competitive conditions change or as manufacturing costs are reduced. Our first quarter revenue is typically seasonally lower than the rest of the year primarily due to the impact of annual price negotiations with customers that occur at the end of the prior year and lower capacity utilization during the holidays in China. However, this historical pattern should not be considered a reliable indicator of our future revenue or financial performance. Our sales transactions to customers are denominated primarily in U.S. dollars, with small portions in Chinese Renminbi (“RMB”) or Japanese Yen (“JPY”).dollars.

In the second quarter of 2019, the BIS added Huawei and certain affiliates to the Entity List. We ceased all shipments to Huawei before the Entity List became effective and resumed shipment in late June 2019 of certain products that have been determined by us to be not subject to EAR. In the second quarter of 2020, the BIS added Fiberhome to the Entity List. We have been applying the same diligence to ensure only non-EAR shipments to Fiberhome. We expect this Entity List and future development of the US-China trade relationship to continue affecting our revenue and operations.
 Three Months Ended
June 30,
Six Months Ended
June 30,
(in thousands, except percentages)20212020$ Change% Change20212020$ Change% Change
Total revenue$65,010 $103,171 $(38,161)(37)%$125,935 $200,572 $(74,637)(37)%

 Three Months Ended
June 30,
Six Months Ended
June 30,
(in thousands, except percentages)20202019$ Change% Change20202019$ Change% Change
Total revenue$103,171  $81,690  $21,481  26%$200,572  $161,056  $39,516  25%
We generate most of our revenue from a limited number of customers. Huawei has consistently been our largest customer, which was again the case in the three months ended June 30, 2020, as it accounted for approximately 52% of our revenue in the second quarter of 2020 and 36% of our revenue for the three months ended June 30, 2019, which was significantly lower due to ceased Huawei shipment for over a month in the quarter as explained above.

In addition to Huawei, weWe have several large customers which may or may not exceed 10% of revenue in any given quarter. One other customer wasThree customers were greater than 10% of our revenue for the three months ended June 30, 20202021 and for the three months ended June 30, 2019. After Huawei, our next four largesttop five customers accounted for 30% and 48%represented 77% of our revenue inrevenue. In the three months ended June 30, 2020, two customers were greater than 10% and 2019, respectively.
We expect that a significant portionthe top five customers represented 82% of our revenue will continue to be derived from a limited numberrevenue. In the six months ended June 30, 2021, four customers were each greater than 10% of customers. As a result, the loss of, or a significant reduction in, orders from any of our key customers would materially affect ourCompany’s total revenue and resultsthe Company's top five customers represented approximately 76% of operations. Similarly, our accounts receivable are from a limited number of customers. As ofthe Company’s total revenue. In the six months ended June 30, 2020, and December 31, 2019, two customers, respectively, eachHuawei accounted for moreapproximately 52% of the Company's total revenue, one other customer was greater than 10% and the Company’s top five customers represented approximately 83% of the Company’s total accounts receivable.revenue.
Huawei was our largest customer in 2020, with $148 million in revenue during the first three quarters of 2020. There were no shipments in the fourth quarter of 2020 to Huawei due to Department of Commerce restrictions.
Three Months Ended June 30, 20202021 Compared With Three Months Ended June 30, 20192020  
Revenue increasedTotal revenue decreased by $21.5$38.2 million, or 26%37%, in the three months ended June 30, 2020,2021 compared to the same period in 2019, reflecting strong end customer demand in China as well as Metro and DCI markets2020. The majority of the decrease is the result of the additional BIS restrictions on Huawei effective in the west, including their offshore contract manufacturers. In the three months ended June 30,third quarter of 2020, High Speed Products represented approximately 90% of totalpartially offset by an increase in our high performance products. Huawei revenue compared to 89% of total revenue in the same period in 2019, while Network Products and Solutions represented approximately 10% of total revenuewas 21% in the three months ended June 30, 2020, compared to approximately 11% of total2021 and was 52% for the same period in 2020. Excluding Huawei, revenue in the three months ended June 30, 2019. Thesecond quarter of 2021 grew 3% and High Speed Product market segment is growing at a much faster pace than Network Products and Solutions, demonstratingproduct revenue grew 17%. Of this, our continued leadership in 400G and faster solutions to address the merging needs for more network bandwidth capacity by both Cloud players and carriers. 400ZR and 400ZR+ pluggable coherent modules were launchedabove product revenue in the fourthsecond quarter of 20192021 increased $16.9 million compared to the same period a year ago and are now shippingcomprised 46% of revenue, up from 13% of revenue in low volume. We expect ramping to volume production later in this year and beyondthe second quarter of 2020. In addition, Network Products and Solutions were also disproportionately impacted by the suspension of shipments due to Huawei's placement on the Entity List.


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Six Months Ended June 30, 20202021 Compared With Six Months Ended June 30, 2019 2020

Revenue increasedTotal revenue decreased by $39.5$74.6 million, or 25%37%, in the six months ended June 30, 2020,2021 compared to the same period in 2019, reflecting both strong end customer demand in China and Metro and DCI markets in2020. The majority of the west, as well asdecrease is the fact that shipments to Huawei, and their affiliate HiSilicon, were halted for 6 weeks in Q2 2019 as a result of their inclusion in the Entity List. Increases in demand wereadditional BIS restrictions on Huawei, partially offset by decreasesan increase in average selling prices. Inour high performance products. Huawei revenue was 12% in the six months ended June 30, 2020, High Speed Products represented approximately 91% of total revenue, compared to 89% of total revenue in2021 and 52% during the same period in 2019, while Network Products and Solutions represented approximately 9% of total2020. Excluding Huawei, revenue in the six months ended June 30, 2020,2021 increased by $14.5 million, or 15%, driven by growth in our High Speed products, which increased 28% compared to approximately 11% of total revenue in the same period during 2020.

In the three and six months ended June 30, 2019. 2021 and 2020, respectively, revenue from China, Americas and rest of the world, based on the ship to location requested by the customer was as follows:

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 Three Months Ended
June 30,
Six Months Ended
June 30,
 2021202020212020
China38 %61 %32 %61 %
Americas%16 %%17 %
Rest of world53 %23 %59 %22 %
Total revenue100 %100 %100 %100 %
Geographic revenue represents the shipment location and frequently changes based on the location of contract manufacturing, rather than end customer location. Shipments to the Americas and to the rest of the world are mainly to contract manufacturers for non-China based network equipment manufacturers ("NEMs").

We believe we will continue to be an industry leader for the highest speed over distance network solutions, supplying customers with components and modules which deliver the highest bandwidth per wavelength and per fiber for long distances. Our High Speed Product market segment consistently represents 90%94% or more of our business. Since launching 400ZR and 400ZR+ pluggable coherent modules launched in the fourth quarter of 2019, will further expand the growth.we have been shipping units for qualification and our first production lines have been installed and are being readied for volume ramping and we continue to invest in production lines for additional capacity. Our QSFP-DD and OSFP 400ZR modules are now in general availability. In addition, Network Productswe are shipping initial quantities of our newest 96Gbaud component suite for superb 800G DCI and Solutions were also disproportionately impacted by the suspension400G long-haul transmissions. We believe these high-performance products will bring revenue growth and potential expansion into other markets. While we expect a significant portion of shipments dueour revenue will continue to Huawei's placement on the Entity List.
In the three and six months ended June 30, 2020 and 2019, respectively,be derived from a limited number of customers, we continue to see some customer diversification with four customers greater than 10% of our revenue from China, Americas and rest of the world, based on the ship to location requested by the customer was as follows:
 Three Months Ended
June 30,
Six Months Ended
June 30,
 2020201920202019
China61 %48 %61 %52 %
Americas16 %24 %17 %21 %
Rest of world23 %28 %22 %27 %
Total revenue100 %100 %100 %100 %
The increase in the proportion of shipments to China was due to China strength during the three months ended June, 2020 and the six months ended June 30, 2020. Shipments to China was up $24 million, or 61%, from the same three month period2021, and expect a further increase in 2019 and up $37 million, or 44%, from the six months period in 2019. Shipments to the Americas and to the restdiversification with expansion of the world are mainly to contract manufacturers for non-China based network equipment manufacturers ("NEMs").our high-performance products.
Cost of Goods Sold and Gross ProfitMargin
Our cost of goods sold consists primarily of the cost to produce wafers, modules and to manufacture and test our products. Additionally, our cost of goods sold generally includes stock-based compensation, write-downs of excess and obsolete inventory, royalty payments, amortization of certain purchased intangible assets, depreciation, acquisition-related fair value adjustments, restructuring charges, warranty costs, royalty payments, logistics and allocated facilities costs.

Gross profit as a percentage of total revenue, or gross margin, has been and is expected to continue to be affected by a variety of factors including the introduction of new products, production volume, factory utilization, the mix of products sold, inventory changes, changes in the average selling prices of our products, changes in the cost and volumes of materials purchased from our suppliers, changes in labor costs, changes in overhead costs or requirements, stock-based compensation, write-downs of excess and obsolete inventories and warranty costs. In addition, we periodically negotiate pricing with certain customers which can cause our gross margins to fluctuate, particularly in the quarters in which the negotiations occurred.

As a manufacturing company, our margins are sensitive to changes in volume and factory utilization, which largely contributedutilization. We have made significant operational improvements with solid progress on cost reductions, yield improvement and effective cost absorption through higher volume in addition to reducing depreciation costs. Because of the 13% gross margin improvementadditional BIS restrictions on Huawei, the business volume in the threesix months ended June 30, 2020,2021 was significantly lower as compared to the same period in 2019,2020; with 37% lower revenue, impacting our factory utilization and 12% gross margin improvement in the six months ended June 30, 2020, as compared to the same period in 2019.
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The China government has imposed tariffs affecting products manufactured in the United States. Certain products manufactured in our U.S. operations have been included in the tariffs imposed on imports into China from the United States. These tariffs were about half of a percentage point of our cost of goods sold for the three months and for the six months ended June 30, 2019. Starting in March 2020, tariffs on most of the products we imported into China have been eliminated and the impact of such tariffs were less than one percentage point of cost of goods sold for the three months ended June 30, 2020.absorption.

 Three Months Ended
June 30,
Six Months Ended
June 30,
(in thousands, except percentages)20202019$ Change% Change20202019$ Change% Change
Cost of goods sold$69,669  $66,015  $3,654  %$137,344  $129,644  $7,700  %
Gross profit$33,502  $15,675  $17,827  114 %$63,228  $31,412  $31,816  101 %
 Three Months Ended
June 30,
Six Months Ended
June 30,
 2020201920202019
Gross profit as a % of revenue32 %19 %32 %20 %
 Three Months Ended
June 30,
Six Months Ended
June 30,
(in thousands, except percentages)20212020$ Change% Change20212020$ Change% Change
Cost of goods sold$55,135 $69,669 $(14,534)(21)%$102,721 $137,344 $(34,623)(25)%
Gross profit$9,875 $33,502 $(23,627)(71)%$23,214 $63,228 $(40,014)(63)%

 Three Months Ended
June 30,
Six Months Ended
June 30,
 2021202020212020
Gross profit as a % of revenue15 %32 %18 %32 %
Three Months Ended June 30, 20202021 Compared With Three Months Ended June 30, 20192020
Gross profit increaseddecreased by $17.8$23.6 million, or 114%71%, to $33.5$9.9 million in the three months ended June 30, 2020,2021, compared to $15.7$33.5 million in the same period in 2019.2020. Gross margin increaseddecreased to 32%15% in the three months ended June 30, 2020,2021, compared to 19%32% in the three months ended June 30, 2019.same period a year ago. The increasedecrease in gross profit reflected an overall improvementis primarily related to the reduction in operationsbusiness volume with $12.1Huawei of approximately $12.2 million, approximately $6.2 million of utilization and related charges, annual price adjustments offset by continuous cost reductions and approximately $4.0 million increase primarily from higher volume and product mix net of annual price reduction, $3.4 million lowerin inventory reservewrite-downs mostly due to a special $3.6 million, or 4.4% of revenue, Huawei EAR special reserve in June 2019, and a $0.9 million decrease of accelerated depreciation for end-of-lineend-of-life products ended by June 30, 2019.reserves.

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Six Months Ended June 30, 20202021 Compared With Six Months Ended June 30, 20192020

Gross profit increaseddecreased by $31.8$40.0 million, or 101%63%, to $63.2$23.2 million in the six months ended June 30, 2020,2021, compared to $31.4$63.2 million in the same period in 2019.2020. The decrease in gross profit was primarily related to the reduction in business volume with Huawei of approximately $28.8 million, approximately $11.3 million of utilization and related charges, annual price adjustments offset by continuous cost reductions and approximately $2.5 million increase in inventory write-downs mostly due to end-of-life products reserves. Gross margin increasedpercentage decreased 14 points to 32%18% in the six months ended June 30, 2020,2021 compared to 20% in32% for the six months ended June 30, 2019. The increase in gross profit was primarily driven by $27.3 million of improvement from higher volume, product mix and better yield net of the annual price reduction and $2.3 million decrease of accelerated depreciation for end-of-line products ended by June 30, 2019.same period last year.
Operating expensesExpenses
Personnel costs are the most significant component of operating expenses and consist of costs such as salaries, benefits, bonuses, stock-based compensation and with regard to sales and marketing expense, other variable compensation.
 Three Months Ended
June 30,
Six Months Ended
June 30,
(in thousands, except percentages)20212020$ Change% Change20212020$ Change% Change
Research and development$15,410 $13,689 $1,721 13 %$28,508 $25,573 $2,935 11 %
Sales and marketing3,362 4,279 (917)(21)%7,227 7,938 (711)(9)%
General and administrative7,398 8,803 (1,405)(16)%14,692 15,592 (900)(6)%
Asset sale related costs(36)120 (156)(130)%127 132 (5)(4)%
Restructuring charges22 — 22 100 %22 — 22 100 %
Total operating expenses$26,156 $26,891 $(735)(3)%$50,576 $49,235 $1,341 %
 Three Months Ended
June 30,
Six Months Ended
June 30,
(in thousands, except percentages)20202019$ Change% Change20202019$ Change% Change
Research and development$13,689  $13,793  $(104) (1)%25,573  28,476  $(2,903) (10)%
Sales and marketing4,279  3,623  656  18 %7,938  8,226  (288) (4)%
General and administrative8,803  7,174  1,629  23 %15,592  14,927  665  %
Amortization of purchased intangible assets—  —  —  — %—  119  (119) (100)%
Asset sale related costs120  47  73  155 %132  376  (244) (65)%
Restructuring charges—  79  (79) (100)%—  258  (258) (100)%
Gain on asset sale—  (817) 817  (100)%$—  $(817) $817  (100)%
Total operating expenses$26,891  $23,899  $2,992  13 %$49,235  $51,565  $(2,330) (5)%
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Research and development

Research and development expense consists of personnel costs, including stock-based compensation, for our research and development personnel, and product development costs, including engineering services, development software and hardware tools, depreciation of equipment and facility costs. We record all research and development expense as incurred.

Three Months Ended June 30, 20202021 Compared With Three Months Ended June 30, 20192020

We focus our research and development efforts to continue pushing the performance leadership boundaries. Research and development expense decreased by $0.1of $15.4 million, or 1%24% of revenue, increased $1.7 million, or 13%, in the three months ended June 30, 2020,2021, compared to the same period in 2019.2020. The decreaseincrease was primarily due to $0.9a $1.5 million lowerincrease in our investment in the development expenses from a temporary push-out of research400ZR and development project spend impacted by the Covid-19 pandemic, offset by an increase of $0.8$0.2 million in variable compensation.payroll and related expenses.

Six Months Ended June 30, 20202021 Compared With Six Months Ended June 30, 20192020

Research and development expense decreased byof $28.5 million, or 23% of revenue, increased $2.9 million, or 10%11%, in the six months ended June 30, 2020,2021, compared to the same period in 2019.2020. The decreaseincrease was primarily due to $4.2$2.1 million lowerof investment in the development of 400ZR and other expenses from$0.6 million depreciation.

We believe that investments in research and development are important to help meet our strategic objectives. We plan to continue to invest in research and development activities, including new products that we believe will further enhance our competitive position and expand our revenue stream. As a $1.5 million one-time license fee recorded as a reduction topercentage of total revenue, our research and development expense in the first quarter of 2020may vary as our investment and a temporary push-out of research and development project spend due to the Covid-19 pandemic, offset by $0.8 million increase in variable compensation and $0.5 million increase from lower government grant credit applied against research and development expenses in the six months ended June 30, 2020.revenue levels change over time.

Sales and marketing

Sales and marketing expense consists primarily of personnel costs, including stock-based compensation and other variable compensation, costs related to sales and marketing programs and services and facility costs.

Three Months Ended June 30, 20202021 Compared With Three Months Ended June 30, 20192020

Sales and marketing expense increaseddecreased by $0.7$0.9 million, or 18%21%, in the three months ended June 30, 2020,2021, compared to the same period in 20192020 primarily from an increasea decrease in variable compensation.


Six Months Ended June 30, 20202021 Compared With Six Months Ended June 30, 20192020

Sales and marketing expense decreased by $0.3$0.7 million, or 4%9%, in the six months ended June 30, 2020,2021, compared to the same period in 20192020 from lower levelsa decrease in variable compensation.
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We expect to continue to expand our high speed market focus and fewerincrease sales and marketing events due tocoverage of the Covid-19 pandemic offset byDCI, Cloud and hyperscale data center markets, particularly the 400ZR and 400ZR+ products as well as the 64 Gbaud and 96 Gbaud component suites. As a net increase in personnel expenses, primarily from variable compensation.percentage of total revenue, our sales and marketing expense may vary as our revenue changes over time.
General and administrative
General and administrative expense consists primarily of personnel costs, including stock-based compensation, for our finance, human resources and information technology personnel and certain executive officers, as well as professional services costs related to accounting, tax, banking, legal and information technology services, depreciation and facility costs.

Three Months Ended June 30, 20202021 Compared With Three Months Ended June 30, 20192020

General and administrative expense increaseddecreased by $1.6$1.4 million or 23%16%, in the three months ended June 30, 2020,2021, compared to the same period in 2019.2020. The increasedecrease was mainly from a $1.2$1.8 million decrease in variable compensation, offset by $0.3 million increase in variable compensationpayroll and a $0.4 million increase of stock-based compensation.related expenses.

Six Months Ended June 30, 20202021 Compared With Six Months Ended June 30, 20192020

General and administrative expense increaseddecreased by $0.7$0.9 million or 4%6%, in the six months ended June 30, 2020,2021, compared to the same period in 2019.2020. The increase isdecrease was mainly from a $1.1$1.6 million decrease in variable compensation, offset by $0.9 million increase in variable compensation net of a decrease of $0.3 million loss from disposal of fixed assets.
Amortization of purchased intangible assets
Our intangible assets are being amortized over their estimated useful lives. Amortization expense relating to technology, patentspayroll and leasehold interests are included within cost of goods sold, while customer relationships are recorded within operatingrelated expenses. Purchased intangible assets related to customer relationships were fully amortized as of December 31, 2019.
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Asset sale related costs
We incurred $0.1 million in the three and six months ended June 30, 2020, respectively, and less than $0.1 million and $0.3 million in the three and six months ended June 30, 2019, respectively, in asset sale related costs for legal and other professional services.
Interest and other income (expense), net
Interest income consists of income earned on our cash, cash equivalents and short-term investments, as well as restricted cash. Interest expense consists of amounts incurred for interest on our bank and other borrowings. Other income (expense), net is primarily made up of government subsidies as well as foreign currency transaction gains and losses. The functional currency of our subsidiaries in China is the RMB and of our subsidiary in Japan is the JPY. The foreign currency transaction gains and losses of our subsidiaries in China and Japan primarily result from transactionsthe mark-to-market of U.S. dollar based assets in U.S. dollars.China and Japan.
 Three Months Ended
June 30,
Six Months Ended
June 30,
(in thousands, except percentages)20212020$ Change% Change20212020$ Change% Change
Interest income$140 $22 $118 536 %$245 $120 $125 104 %
Interest expense(220)(301)81 (27)%(447)(679)232 (34)%
Other income (expense), net(880)(195)(685)351 %263 1,003 (740)(74)%
Total$(960)$(474)$(486)103 %$61 $444 $(383)(86)%

 Three Months Ended
June 30,
Six Months Ended
June 30,
(in thousands, except percentages)20202019$ Change% Change20202019$ Change% Change
Interest income$22  $99  $(77) (78)%$120  $198  $(78) (39)%
Interest expense(301) (496) 195  (39)%(679) (989) 310  (31)%
Other income (expense), net(195) 1,090  (1,285) (118)%1,003  (508) 1,511  (297)%
Total$(474) $693  $(1,167) (168)%$444  $(1,299) $1,743  (134)%
Three Months Ended June 30, 2021 Compared With Three Months Ended June 30, 2020
Interest income and expense includedremained flat in interest and otherthe three months ended June 30, 2021 compared to the same period a year ago. Other income (expense), net decreasedincreased by $0.2$0.7 million in the three months ended June 30, 2020,2021, as compared to the same period in 2019.2020, due to U.S. dollar depreciation against both the Chinese Renminbi and Japanese Yen.
Six Months Ended June 30, 2021 Compared With Six Months Ended June 30, 2020

Interest expense decreased by $0.2 million in the six months ended June 30, 2021, as compared to the same period in 2020. The decrease in interest expense was due to a $10$6 million decrease in outstanding borrowings from June 30, 20192021 to June 30, 2020 and lower interest rate on our Wells Fargo loan. Other income (expense), net, included in interest and other income (expense), net, decreased by $1.3 million in the three months ended June 30, 2020, as compared to the same period in 2019, due to U.S. dollar depreciation against both the Chinese Renminbi and Japanese Yen.

Interest expense included in interest and other income (expense) net decreased by $0.3$0.7 million in the six months ended June 30, 2020,2021, as compared to the same period in 2019. The decrease in interest expense was due to a $10 million decrease in outstanding borrowings from June 30, 2019 to June 30, 2020, and lower interest rate on our Wells Fargo loan. Other income (expense), net included in interest and other income (expense), net, increased $1.5 million in the six months ended June 30, 2020, as compared to the same period in 2019, primarily due to U.S. dollar appreciationdepreciation against the Chinese Renminbi in the six months period year onover year.
Income taxes 
We conduct our business globally and our operating income is subject to varying rates of tax in the U.S., China, Japan and other various foreign jurisdictions. Consequently, our effective tax rate is dependent upon the geographic distribution of our earnings or losses and the tax laws and regulations in each geographical region.

Three Months Ended
June 30,
Six Months Ended
June 30,
Three Months Ended
June 30,
Six Months Ended
June 30,
(in thousands, except percentages)(in thousands, except percentages)20202019$ Change% Change20202019$ Change% Change(in thousands, except percentages)20212020$ Change% Change20212020$ Change% Change
Income tax (provision) benefit$(412) $205  $(617) (301)%(2,405) 35  $(2,440) (6,971)%
Income tax provisionIncome tax provision$(192)$(412)$220 (53)%(823)(2,405)$1,582 (66)%

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Our income tax (provision) benefitprovision in the three and six months ended June 30, 2021 was primarily related to the operating profit realized in our foreign subsidiaries in Japan and China. Historically, we have experienced net losses in the U.S. and in the short term, we expect this trend to continue.

Our income tax provision in the three and six months ended June 30, 2020 and 2019 was primarily related to the profitability of our U.S. operations duringand the threeoperating profit realized in our foreign subsidiaries in Japan and six months ended June 30, 2020, whereas the U.S. operations posted losses from operations in the three and six months ended June 30, 2019.China.
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Liquidity and capital resources
As of June 30, 2020,2021, we had working capital of $144.1$126.3 million, including total cash, short-term investments and restricted cash of $113.3$95.0 million. Approximately 26%36% of our total cash, short-term investments and restricted cash were held by our foreign entities, including approximately $21.2$26.4 million in accounts held by our subsidiaries in China, of which $11.0$0.5 million was in restricted cash, and approximately $8.3$7.4 million in accounts held by our subsidiary in Japan. Cash, short-term investments and restricted cash held outside of the U.S. may be subject to taxes if repatriated and may not be immediately available for our working capital needs.
Approximately $9.2$10.0 million of our retained earnings within our total accumulated deficit as of December 31, 20192020 was subject to restrictions due to the fact that our subsidiaries in China are required to set aside at least 10% of their respective accumulated profits each year end to fund statutory common reserves. This restricted amount is not distributable as cash dividends except in the event of liquidation.
In September 2017 weOn June 29, 2021, the Company entered into a revolving line of credit agreementthe A&R Credit Agreement with Wells Fargo, Bank, National Association ("Wells Fargo") as the administrative agent for a lender group (the "Wells Fargogroup. The A&R Credit Facility" or "Credit Facility"Agreement amends and restates in full that certain Credit Agreement dated as of September 8, 2017 (as amended, the "Former Credit Agreement")., by and among the Company and Wells Fargo. The A&R Credit Agreement provides for continuation of the $50 million revolving credit facility.
The Wells Fargo Credit Facility provides for borrowings equal to the lower of (a) a maximum revolver amount of $50.0 million, or (b) an amount equalup to 80% - 85%90% of eligible accounts receivable plus 100% of qualified cash balances up to $15.0 million, less certain discretionary adjustments ("Borrowing Base"). The maximum revolver amount may be increased by up to $25.0 million, subject to certain conditions.
The Credit Facility matures on June 30, 20222026 and borrowings bear interest, at the Company's options, at an interest rate option of either (a) the LIBOR rate, plus an applicable margin ranging from 1.50% to 1.75% per annum, based upon the average excess availability (as defined in the Credit Facility), or (b) the prime lending rate, plus an applicable margin ranging from 0.50% to 0.75% per annum. We areannum, based upon the average excess availability. The Company is also required to pay a commitment fee equal to 0.25% of the unused portion of the Credit Facility.Facility, monthly, in arrears.
The Credit Facility agreement requires a mandatory prepayment of the borrowings to the extent the outstanding balance is greater than the lesser of (a) the most recently calculated Borrowing Base, or (b) the maximum revolver amount. The Borrowing Base calculation contains a customary provision that gives the lender the ability to reduce the Borrowing Base by reserves that are subjectively determinable, whichCompany is considered a subjective acceleration clause. We are required to maintain a combination of certain defined cash balances and unused borrowing capacity under the Credit Facility of at least $20.0 million, of which at least $5.0 million must beshall include unused borrowing capacity. The Agreement also restricts the Company's ability to dispose of assets, to permit change in control, merge or consolidate, make acquisitions, incur indebtedness, grant liens, make investments and make certain restricted payments. Borrowings under the Credit Facility are collateralized by substantially all of ourthe Company's assets.
On June 14, 2019, we entered into a First Amendment to the Credit Facility (the "Amended Credit Facility"). The Amendment removes Huawei from the list of “Eligible Accounts” as a basis for our borrowing while Huawei is on the Entity List. During the period of time while Huawei remains on the Entity List, the concentration limits of certain other customers are increased to partially offset the removal of Huawei. Additionally, until Huawei is no longer on the Entity List, we are required to maintain a temporary combination of certain defined unrestricted cash and unused borrowing capacity under the credit facility of at least $30.0 million in the U.S. and $40.0 million world-wide, of which at least $5.0 million shall include unused borrowing capacity. In June 2020, Fiberhome was added to the Entity List and was also removed from the Borrowing Base.
We were in compliance with the covenants of thisthe Credit Facility as of June 30, 2020.2021 and December 31, 2020 (under the terms of the Former Credit Agreement). As of June 30, 2020,2021, the outstanding balance under the Credit Facility was $22.8$20.3 million and the weighted average rate under the LIBOR option was 2.37%1.93%. The remaining borrowing capacity as of June 30, 20202021 was $6.6$14.0 million, of which $5.0 million is required to be maintained as unused borrowing capacity.
We regularly issue short-term notes payable to our suppliers in China in exchange for accounts payable. These notes are supported by non-interest bearing bank acceptance drafts and are due three to six months after issuance. As a condition of the notes payable arrangements, we are required to keep a compensating balance at the issuing banks that is a percentage of the total notes payable balance until the amounts are settled. As of June 30, 2020,2021, our subsidiarysubsidiaries in China had two line of credit facilities with banking institutions.
Under these line of credit facilities, the non-interest bearing bank acceptance drafts issued in connection with our notes payable to our suppliers in China, had no outstanding balance at June 30, 20202021 and December 31, 2019. Compensating2020. There were no compensating balances relating to these credit facilities totaled $2.5 million as of June 30, 20202021 and December 31, 2019.2020, respectively. Compensating balances are classified as restricted cash on our condensed consolidated balance sheets.
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As of June 30, 2020,2021, we had two loan arrangements with MUFG Bank, Ltd. (collectively the “Mitsubishi Bank Term Loans”) and a third loan arrangement with the MUFG Bank, Ltd. and The Yamanashi Chuo Bank, Ltd. One of Mitsubishi Bank Term Loans requires equal monthly payments of principal equal to 8.3 million JPY (approximately $0.1 million) until the maturity date of February 25, 2025, with a lump sum payment of the balance of 8.4 million JPY (approximately $0.1 million) on the maturity date. Interest on this loan accrues and is paid monthly based upon the annual rate of the monthly Tokyo Interbank Offer Rate (TIBOR) plus 1.40% and is secured by manufacturing equipment owned by our subsidiary in Japan. The second term loan of 690.0 million JPY (approximately $6.4$6.2 million) (the “2017 Mitsubishi Bank Loan”) was entered into in March 2017 to acquire manufacturing equipment for our Japanese subsidiary and has an annual interest rate of the monthly TIBOR rate plus 1.00%. The 2017 Mitsubishi Bank Loan requires monthly interest and principal payments over 72 months commencing in April 2018. This loan was available from March 31, 2017 to March 30, 2018 and 690.0 million JPY (approximately $6.4$6.2 million) under this loan was fully drawn in March 2017. In January 2018, we entered into a term loan agreement with MUFG Bank, Ltd. and The Yamanashi Chuo Bank, Ltd. for a term loan in the aggregate principal amount of 850.0 million JPY (approximately $7.9$7.7 million) (the "Mitsubishi-Yamanashi Term Loan"). The Mitsubishi-Yamanashi Term Loan was available from January 29, 2018 to January 29, 2025. The full amount of the Mitsubishi-Yamanashi Term Loan was drawn on January 29, 2018. Interest on the Mitsubishi-Yamanashi Term Loan is based upon the annual rate of the three months TIBOR rate plus 1.00%. The Mitsubishi-Yamanashi Term Loan requires quarterly interest payments, along with the principal payments, over 82 months commencing in April 2018. As of June 30, 2020,2021, our aggregate outstanding principal balance under Mitsubishi Bank Term Loans and Mitsubishi-Yamanashi Term Loan was 1.51.1 billion JPY (approximately $13.7$10.3 million). Refer to Note 8 of Notes to Condensed Consolidated Financial Statements in Item 1 of Part I of this Report for further details.
From time to time we accept notes receivable in exchange for accounts receivable from certain of our customers in China. These notes receivable are non-interest bearing and are generally due within six months. Historically, we have collected on the notes receivable in full at the time of maturity.
In the first six months of 2020,2021, we generated an operating incomeloss of $14.0$27.4 million and used cash from operations was $34.5of $21.7 million. WeAt June 30, 2021, we had an accumulated deficit of $402.5 million as of June 30, 2020.$447.0 million. As of June 30, 2020,2021, the remaining borrowing capacity under our revolving line of credit agreement with Wells Fargo Bank, was $6.6$14.0 million, of which $5.0 million is required to be maintained as unused borrowing capacity. Additionally, we had $3.1$3.0 million of current portion of long-term debt as of June 30, 2020,2021, which we plan to pay out from our existing available cash.
In China, when there is a case pending in judicial court, banks may chooseWe believe that our existing cash, cash equivalents and cash flows from our operating activities will be sufficient to limit borrowing against existing credit lines, regardlessmeet our anticipated cash needs for at least the next 12 months. Our future capital requirements will depend on many factors including our growth rate, the timing and extent of spending to support development efforts, the legitimacyexpansion of sales and marketing activities, the case. We have a dispute pending with APAT OE in judicial court. (Referintroduction of new and enhanced products, the costs to Note 11 of Notes to Condensed Consolidated Financial Statements in Item 1 of Part I of this Report for further details.) We do not expect to make any additional draws againstincrease our credit facilities in China until this matter is resolved. We have sufficient cashmanufacturing capacity and credit lines available inour foreign operations and the U.S., and believe this will not adversely impact our operations in China.
On May 16, 2019, the BIS added Huawei and certain affiliates to the Entity List, with an effective date of May 21, 2019. This denies Huawei the ability to purchase products, software and technology that are subject to EAR. As Huawei is our largest customer, this is expected to have a material impact on our forecasted revenue and profitability. To adjust to the revised forecast, we have adjusted capital expenditures, operating expenditures, project plans and reset incoming materials to adjust to changing demand levels. We continue to implement actions to improve cash flow and profitability.
Rusnano Rights Agreement
Under our amended rights agreement, dated June 30, 2015, with Rusnano, onecontinuing market acceptance of our principal stockholders,products. In the event that additional financing is required from outside sources, we agreedmay not be able to make a $30.0 million investment commitment (the “Investment Commitment”) towardraise it on terms acceptable to us or at all. If we are unable to raise additional capital when desired, our Russian operations. If certain of the Investment Commitments were not achieved in the indicated time frames through 2019, we had the ability to exit our Russian operations by paying an exit fee of up to $2.0 million at that time.
In April 2019, we completed the sale of 100% interest in the operations of NeoPhotonics Corporation, LLC, our manufacturing operations in Russia, to Rusnano. In connection with the sale, we received $2.0 million in cashbusiness, operating results and settled the $2.0 million exit fee.
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financial condition would be adversely affected.
Cash flow discussion 
The table below sets forth selected cash flow data for the periods presented:
 Six Months Ended
June 30,
(in thousands)20202019
Net cash provided by operating activities$34,494  $9,433  
Net cash used in investing activities(5,452) (2,142) 
Net cash used in financing activities(4,704) (9,955) 
Effect of exchange rates on cash, cash equivalents and restricted cash(186) 66  
Net increase in cash, cash equivalents and restricted cash$24,152  $(2,598) 
 Six Months Ended
June 30,
(in thousands)20212020
Net cash provided by (used in) operating activities$(21,675)$34,494 
Net cash used in investing activities(4,451)(5,452)
Net cash used in financing activities(2,248)(4,704)
Effect of exchange rates on cash, cash equivalents and restricted cash99 (186)
Net increase (decrease) in cash, cash equivalents and restricted cash$(28,275)$24,152 
Operating activities
Net cash provided byused in operating activities was $34.5$21.7 million in the six months ended June 30, 2020,2021, compared to $9.4$34.5 million net cash provided by operating activities in the same period in 2019.2020. The net cash provided byused in operating activities increased by $25.1$56.2 million primarily due to the increase in net incomeloss of $33.7$40.2 million, a $2.9 million net decrease in non-cash adjustments primarily related to write-down of inventories and depreciation and amortization, a net decrease in working capital of $4.1$16.8 million duerelated to a net settlement of all APAT accounts of approximately $3.8 million as a result of the litigation settlement from the fourth quarter of 2020, timing of payments, collection efforts and inventory management and a net decreaseincrease of foreign currency remeasurement by $1.6$0.9 million, primarily due to appreciationdepreciation in U.S. dollar against RMB.RMB when compared to the same period in 2020.
Investing activities
Net cash used in investing activities was $5.5$4.5 million in the six months ended June 30, 2020,2021, compared to $2.1$5.5 million used in investing activities in the same period in 2019.2020. The decrease in cash flows used in investing activities was primarily due to an increase in purchases of property, plant and equipment of $1.5 million and an decrease in proceeds from the sale of property, plant and equipment and other assets of $1.9$0.9 million, when compared to 2019.the same period in 2020.

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Financing activities
Net cash used in financing activities was $4.7$2.2 million in the six months ended June 30, 2020,2021, compared to $10.0$4.7 million used in financing activities in the same period in 2019.2020. The increasedecrease in cash flows used in financing activities was primarily due to a decrease in net payments under our note payable and debt arrangements of $5.0$3.9 million a decrease in net paymentsand an increase of notes payableproceeds received from exercise of $4.9stock options of $1.5 million, offset by a net decreasean increase in proceeds from bank loanspayments related to tax withholding on restricted stock units of $5.0$2.9 million when compared to the same period in 2019.2020.
Off-balance Sheet Arrangements 
As of June 30, 2020,2021, we did not have any significant off-balance sheet arrangements.
Recent Accounting Pronouncements
Refer to Note 1 “Basis of presentation and significant accounting policies” in the Notes to Condensed Consolidated Financial Statements in Item 1 of Part I of this Quarterly Report on Form 10-Q for a description of recent accounting pronouncements and accounting changes.

 ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK  
Our exposures to other market risk have not changed materially since December 31, 2019.2020. For quantitative and qualitative disclosures about market risk, see Item 7A Quantitative and Qualitative Disclosures About Market Risk, in our Annual Report on Form 10-K/A10-K for the year ended December 31, 2019.2020. 
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ITEM 4. CONTROLS AND PROCEDURES
Evaluation of Disclosure Controls and Procedures
Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of the design and operation of our disclosure controls and procedures as of June 30, 2020.2021. The term “disclosure controls and procedures,” as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act, means controls and other procedures of a company that are designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the SEC’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is accumulated and communicated to the Company’s management, including its principal executive and principal financial officers, as appropriate to allow timely decisions regarding required disclosure.
Based upon that evaluation, our Chief Executive Officer and Chief Financial Officer concluded that, as of the end of the period covered in this report, our disclosure controls and procedures were effective at a reasonable assurance level.
Changes in Internal Control over Financial Reporting
There have not been any changes in our internal control over financial reporting (as defined in Rule 13a-15(f) under the Securities and Exchange Act of 1934, as amended) for the quarter ended June 30, 20202021 that materially affected, or are reasonably likely to materially affect, our internal control over financial reporting. We have not experienced any material impact to our internal controls over financial reporting despite the fact that most of our employees are working remotely due to the Covid-19 pandemic. We are continually monitoring and assessing the impact of the Covid-19 pandemic on our internal controls to minimize the impact on their design and operating effectiveness.
Inherent Limitation on the Effectiveness of Internal Controls
The effectiveness of any system of internal control over financial reporting is subject to inherent limitations, including the exercise of judgment in designing, implementing, operating, and evaluating the controls and procedures, and the inability to eliminate misconduct completely. Accordingly, any system of internal control over financial reporting can only provide reasonable, not absolute assurances. In addition, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate. We intend to continue to monitor and upgrade our internal controls as necessary or appropriate for our business, but cannot assure that such improvements will be sufficient to provide us with effective internal control over financial reporting.
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PART II. OTHER INFORMATION
 
ITEM 1.    LEGAL PROCEEDINGS
From time to time, we are involved in litigation that we believe is of the type common to companies engaged in our line of business, including commercial disputes and employment issues. As of the date of this Quarterly Report on Form 10-Q, other than as described below, we are not involved in any pending legal proceedings that we believe could have a material adverse effect on our financial condition, results of operations or cash flows. However, disputes in the future may involve claims by a third party that our activities infringe their intellectual property rights. These and other types of intellectual property rights claims generally involve the demand by a third party that we cease the manufacture, use or sale of the allegedly infringing products, processes or technologies and/or pay substantial damages or royalties for past, present and future use of the allegedly infringing intellectual property. Claims that our products or processes infringe or misappropriate any third-party intellectual property rights (including claims arising through our contractual indemnification of our customers) often involve highly complex, technical issues, the outcome of which is inherently uncertain. Moreover, from time to time, we may pursue litigation to assert our intellectual property rights. Regardless of the merit or resolution of any such litigation, complex intellectual property litigation is generally costly and diverts the efforts and attention of our management and technical personnel which could adversely affect our business.
For a discussion of our current legal proceedings, please refer to the information set forth under the “Litigation” section in Note 11, Commitments and Contingencies, in Notes to Condensed Consolidated Financial Statements in Item 1 of Part I of this Quarterly Report on Form 10-Q, which is incorporated herein by reference.
ITEM 1A.    RISK FACTORS 
Except for those risk factors denoted by an asterisk (*), the risk factors facing our company have not changed materially from those set forth in Part I, Item 1A of our Annual Report on Form 10-K/A10-K for the year ended December 31, 2019,2020, as filed with the SEC on March 3, 2020,February 25, 2021, which risk factors are set forth below.
Risks Associated with Our Business
*We are dependent on Huawei Technologies Co., Ltd. and its affiliate HiSilicon Technologies Co., Ltd. and on four othera small number of customers for a largesignificant portion of our revenue and the loss of, or a significant reduction in orders in any period from any of these major customers may reduce our revenue and adversely impact our results of operations.

The telecommunications systems market is concentrated with approximately ten global network equipment manufacturing companies having collectively more than 90% market share. In the three months ended June 30, 2020 and 2019 Huawei accounted for approximately 52% and 36% of our revenue, respectively. In the six months ended June 30, 2020 and 2019 Huawei Technologies Co. Ltd., together with its affiliate HiSilicon Technologies Co., Ltd. (collectively “Huawei”) accounted for approximately 52% and 43% of our revenue, respectively. Revenue generated from one other customer in the three and six months ended June 30, 2020 and 2019 was greater than 10% of our revenue. We have generated most of our revenue from a limited number of customers. InOur top five customers accounted for 77% of our revenue in the three months ended June 30, 20202021 and 2019, our top five customers represented 82% and 84% of our revenue respectively. Inin the sixthree months ended June 30, 2020 and 2019, our top five2020. Three customers represented 83% and 85%were greater than 10% of our revenue respectively. for the three months ended June 30, 2021 and two customers were greater than 10% for the three months ended June 30, 2020.

The lack of significant growth from, the loss of, or a significant reduction in orders from any of theseour major customers would materially and adversely affect our revenue and results of operations.

*We are subject to governmental export In 2020 and import controls that could subject us to liability, impairin the three months ended March 31, 2021, the reduction in revenue from Huawei, our ability to competelargest customer in international markets, or restrict our sales to certain customers. In particular, U.S. governmental export control actions have impacted our sales to Huawei, which2020, has had (and may continue to have) a material adverse effect on our business, financial condition and results of operations. Our sales to Huawei are expected to remain adversely impacted.

We are subject
Our solutions for the Cloud and data center market segments may not achieve broader market acceptance, which would prevent us from increasing our revenue and market share.

Part of our overall strategy is to exportcontinue to expand our optoelectronic solutions for the highest speed Cloud and import control laws, trade regulations and other trade requirements that limit which productsdata center market segments. If we sell and where andfail to whom we sell our products. In some cases, it is possible that export licenses would be required from the U.S. or other government agencies such as, but not limited to, those in Japan or China for someachieve broader acceptance of our products in accordance with various statutes or regulations. In addition, various countries regulate the export or import of certain technologiesCloud and have enacted laws that could limit our ability to distribute our products. Failure to comply with these and similar laws on a timely basis, or at all, or any limitationdata center markets, there would be an adverse impact on our ability to export or sellincrease our revenue, gain market share and achieve and sustain profitability. Our ability to achieve broader market acceptance for our products or to obtain any required licenses would adversely affect our business, financial condition and results of operations.

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In May 2019, BIS, added Huawei and certain affiliates to the Entity List. Absent a license, this action prevents Huawei from purchasing products, software and technology that are subject to EAR. To ensure compliance, we immediately suspended shipments to Huawei and began a systematic assessment of our products sold to Huawei to determine how these products are, or are not, subject to the restrictions resulting from the Entity List. This suspension had an immediate impact on our products shipments to Huawei in the second quarter of 2019, which significantly affected our revenue for the remainder of 2019. We have consulted closely with legal and technical experts, in order to determine which of our products and associated technology, notably our foreign-manufactured products, are not subject to EAR or have de minimis content subject to EAR and may be lawfully sold to Huawei and its affiliates. Each product and associated technology must be reviewed individually in a detailed, specific and time consuming process. Consequently, we have reset our business approach with and shipments to Huawei to consist of only products that have been determined to be not subject to the EAR regulations or that have de minimis content subject to EAR regulations.

Starting around the end of June 2019, U.S. government officials allowed companies to apply for temporary export licenses for products subject to EAR and stated that these licenses might be granted if the product was deemed not to be a risk to national security. We have submitted license applications for certain products and associated technology having elements subject to EAR. To date, we have received a license for limited, but not material, volumes of U.S. origin lasers. There can be no assurance as to which products or technology may qualify for a license, or that any such licenses will be granted in a timely manner or at all. Furthermore, there can be no assurance that the U.S. government will not challenge our determination of which products and associated technology are not subject to the EAR regulations.

Even if licenses are obtained, or if the EAR restrictions are lifted or modified to allow us to sell the same types of products we have sold historically, Huawei may decide not to purchase these products for various reasons, including to reduce its own risks of being exposed to disruptions of its supply chain.

In May 2020, the EAR was updated to further restrict certain types of foreign-manufactured content with regard to Huawei. We verified that these revisions do not impact any of our products that we have previously determined to be not subject to the EAR, and that we may continue those shipments to Huawei. Although we are presently unaware of additional pending changes to the EAR, further changes, such as a change to de minimis calculations, could result in restrictions on the products that we are presently allowed to ship to Huawei.

A significant reduction in orders from Huawei as a result of these U.S. export control actions would materially and adversely affect our business, financial condition, and results of operations.

Additionally, in May 2020, BIS added Fiberhome Technologies Group and certain affiliates ("Fiberhome") to the Entity List with an effective date of June 5, 2020. This actionimpacted by BIS denies Fiberhome the ability to purchase products, software and technology that are subject to EAR. Based upon our initial review of a number of affected products, we believe that the products purchased by Fiberhome from us arefactors, but not subject to EAR and shipments of those products have continued. It is possible that upon reviewing additional products, those products may be subject to EAR and we will be unable to supply those products to Fiberhome. Further changes to EAR could result in restrictions on the products that we are presently allowed to ship to Fiberhome.

* The Covid-19 pandemic could harm our operations and our financial operations.

On March 12, 2020, the World Health Organization declared the Covid-19 coronavirus to be a pandemic. In an effort to contain and mitigate the spread of Covid-19, many countries, including China and the United States, have imposed significant restrictions on travel and business and government operations. There have been business closures and a substantial reduction in economic activity in countries that have had significant outbreaks of Covid-19.

Our operations and supply chain are and could continue to be impacted by the implications of the Covid-19 pandemic, which could harm our future revenue and financial condition and increase our costs and expenses. Our manufacturing operations in Silicon Valley, California; Tokyo, Japan; and Shenzhen and Dongguan, China have been affected and could continue to be affected with actions such as being temporarily shut down, requiring longer lead times or being subject to logistics issues. The same issues could impact key suppliers in Patumthanee, Thailand, and Ottawa, Canada and other locations throughout United States and Asia. The efficiency of our business operations (including sales and research and development) could also be reduced as a result of compliance with shelter-in-place orders in Silicon Valley, California; Ottawa, Canada; and Shenzhen and Wuhan, China.

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Similarly, our worldwide operations could be subject to secondary effects of the pandemic. Even if our facilities are not directly affected, the pandemic and its effects could substantially disrupt the business of our suppliers or customers, which could have a material adverse effect on us.

Accordingly, we may experience significant disruptions as a result of the Covid-19 pandemic that could materially impact our business, including:limited to:

slower customer deploymentsOur ability to produce optoelectronic solutions for 100G to 800G and beyond that compete favorably against other solutions on the basis of systems using our products due to uncertainty in the business climate;price, quality, reliability and performance;

reduced demand forOur ability to timely introduce and complete new designs and timely qualify and certify our products;

disruptions of the supply chain of components needed forWhether major Cloud and hyperscale data center operators will adopt our products;solutions, which are based on a new network architecture and have a limited history in these market segments;

disruptions of ourOur ability to conduct sales, marketing, product developmentdevelop products that comply with applicable standards and other important business activities.regulatory requirements, as well as potential in-country manufacturing requirements; and;

The extentOur ability to which the Covid-19 pandemic may impactdevelop and maintain successful relationships with our business will depend on future developments, which are highly uncertaincustomers and cannot be predicted with confidence, such as the duration of the outbreak, travel restrictions, governmental mandates issued to mitigate the spread of the disease, business closures, economic disruptions, and the effectiveness of actions taken to contain and treat the virus.Accordingly, we expect the Covid-19 pandemic may have a negative impact on our sales and our results of operations, the size and duration of which we are currently unable to predict.We are not insured against major public health events, including the Covid-19 pandemic.

To the extent the Covid-19 pandemic adversely affects our business and financial results, it may also have the effect of heighteningsuppliers, many of the other risks described in this ‘‘Risk Factors’’ section, such as reduced spending for communications networks, fluctuations in customer demand, manufacturing and supply constraints, and our ability to raise capital (if necessary).

We face intense competition which could negatively impact our results of operations and market share.

The communications networks industry is highly competitive. Our competitors range fromwhom are large international companies offering a wide range of products to smaller companies specializing in niche products.

Some of our competitors have substantially greater name brand recognition, technical, financial, and marketing resources, and greater manufacturing capacity, as well as better-established relationships with customers, than we do. Some of our competitors have more resources to develop or acquire, and more experience in developing or acquiring, new products and technologies. Some of our competitors may be able to develop new products more quickly than us and may be able to develop products that are more reliable or which provide more functionality than ours. In addition, some of our competitors have the financial resources to offer competitive products at below-market pricing levels that could prevent us from competing effectively and result in a loss of sales or market share or cause us to lower prices for our products.

substantial negotiating power.
We also face competition from some of our customers who evaluate our capabilities against the merits of manufacturing products internally, including Huawei. Due to the fact that such customers are not seeking to make a comparable profit directly from the manufacture of these products or for other reasons, they may have the ability to provide competitive products at a lower total cost than we would charge such customers. As a result, these customers may purchase less of our products and there would be additional pressure to lower our selling prices which, accordingly, would negatively impact our revenue and gross margin.

In December 2017, the Chinese Government Ministry of Industry and Information Technology announced a five-year optical component technology roadmap with the aim to reduce China’s dependency on non-domestic companies for high-end optical chips and sub-components, including some products manufactured and sold by us. This announcement continues an ongoing trend in China to build domestic industry in this area and, while we believe local Chinese component suppliers do not currently have the capability to supply the highest performance optical chips and sub-components, those companies may over time develop such capability and negatively impact our revenue and financial performance if we do not continue to innovate and maintain our lead in the highest speed and performance optical components. This trend may accelerate as a result of the current Huawei listing on the Entity List and U.S.-China trade tensions.

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We are subject to risks and uncertainties related to our revenue growth outlook in China.
Fiber optics telecommunication growth in China is an important contributor to our success. We expect a major portion of our revenue to come from companies supporting China infrastructure spending in wireline and wireless networks, notably from the three largest China telecom carriers, China Mobile Communications Corporation, China Telecommunications Corporation and China United Network Communications Group Co., Ltd. If the anticipated Chinese spendingCloud and carrier tender awards do not increasedata center market segments fail to grow as anticipated,expected, or if there are further unanticipated and/or prolonged delaysdemand for our solutions in the Chinese initiative,these segments fails to materialize, our business, financial condition, results of operations, and prospects would be further adversely affected.

Continued tension in U.S.-China trade relations may adversely impact our business and operating results.

Beyond the BIS actions affecting our sales to Huawei, the U.S. government has taken certain actions that change U.S. trade policies, including recently-imposed tariffs affecting certain products manufactured in China. Some products manufactured by our Chinese affiliates are subject to tariffs if imported into the United States. In addition, the China government has taken certain reciprocal actions, including recently imposed tariffs affecting certain products manufactured in the United States. Certain of our products manufactured in our U.S. operations have been included in the tariffs imposed on imports into China from the United States. Starting in March 2020, tariffs on most of the products we imported into China have been eliminated and the impact of such tariffs were less than one percentage point of cost of goods sold for the three months ended June 30, 2020.

It is unknown whether and to what extent additional new tariffs (or other new laws or regulations) will be adopted that increase the cost of importing products to or from the United States, or from China to the United States. Further, it is unknown what effect that any such new tariffs or retaliatory actions would have on us or our industry and customers. As additional new tariffs, legislation and/or regulations are implemented, or if existing trade agreements are renegotiated or if China or other affected countries take retaliatory trade actions, such changes could have a material adverse effect on our business, financial condition, results of operations or cash flows.suffer.

Manufacturing problems and supply constraints could impact manufacturing yields or result in delays in product shipments to customers and could adversely affect our revenue, competitive position and reputation.

We may experience delays, disruptions or quality control problems in our manufacturing operations or supply chain constraints, which could adversely impact manufacturing volumes, yields or delay or reduce product shipments. As a result, we could incur additional costs that would adversely affect our gross margin, and product shipments to our customers could be delayed beyond the shipment schedules requested by our customers, which would negatively affect our revenue, competitive position and reputation.

Additionally, manufacturing of new products and manufacturing yields more generally depend on a number of factors, including the stability and manufacturability of the product design, manufacturing improvements gained over cumulative production volumes, the quality and consistency of component parts and the nature and extent of customization requirements by customers. Capacity constraints, raw materials shortages, logistics issues, labor shortages, volatility in utilization of manufacturing operations, supporting utility services and other manufacturing supplies, the introduction of new product lines, rapid increases in production demands and changes in customer requirements, manufacturing facilities or processes, or those of some third party contract manufacturers and suppliers of raw materials and components have historically caused, and may in the future cause, reduced manufacturing yields, negatively impacting the gross margin on, and our production capacity for, those products.

Our ability to maintain sufficient manufacturing yields is particularly challenging with respect to PICs due to the complexity and required precision of a large number of unique manufacturing process steps. Manufacturing yields for PICs can also suffer if contaminated materials or materials that do not meet highly precise composition requirements are inadvertently utilized. Because a large portion of our PIC manufacturing costs are fixed, PIC manufacturing yields can have a substantial effect on our gross margin. Lower than expected manufacturing yields could also delay product shipments and decrease our revenue.

Further, our products contain purchased components including electronic components. Itcomponents and semiconductors. Due to the global shortages in the supply of semiconductors, we may be unable to meet our growth and revenue targets due to an inability to purchase sufficient components for our products to satisfy customer demand.

Additionally, it is possible that such purchased itemscomponents could contain quality defects, manufacturing defects, performance problems or even counterfeit substitutes, each of which could result in manufacturing issues. As a result, we could incur additional costs that would adversely affect our gross margin, and product shipments to our customers could be delayed beyond the shipment schedules requested by our customers, which would negatively affect our revenue, competitive position and reputation.

If our customers do not qualify our products for use or do not award us design wins, then our results of operations may suffer.

Prior to placing volume purchase orders with us, most of our customers require us to obtain their approval, a process called qualification in our industry, for our new and existing products. Our customers often audit our manufacturing facilities and perform other vendor evaluations during this process. The qualification process involves product sampling and reliability testing and collaboration with our product management and engineering teams in the design and manufacturing stages. If we are unable to qualify our products with customers, then our revenue would be lower than expected and we may not be able to recover the costs associated with the qualification process which would have an adverse effect on our results of operations.

In addition, due to evolving technological changes in our markets, a customer may cancel or modify a design project before we have qualified our product or begun volume manufacturing of a qualified product. It is unlikely that we would be able to recover the expenses for cancelled or unutilized custom design projects.

Once we have achieved qualification, there is no guarantee that our customers will purchase our products in volume. Our customers typically select two to three vendors per design or version of their products and award a design win. If we are not awarded a design win, our customer will not place volume purchase orders for that version of the customer product.

We are subject to governmental export and import controls that could subject us to liability, impair our ability to compete in international markets, or restrict our sales to certain customers. In particular, U.S. governmental export control actions have impacted our sales to Huawei, which has had (and may continue to have) a material adverse effect on our business, financial condition and results of operations.

We are subject to export and import control laws, trade regulations and other trade requirements that limit which products we sell and where and to whom we sell our products. In some cases, it is possible that export licenses would be required from the U.S. or other government agencies outside the United States such as, but not limited to, Japan or China for some of our products in accordance with various statutes or regulations. In addition, various countries regulate the export or import of certain technologies and have enacted laws that could limit our ability to distribute our products. Failure to comply with these and similar laws on a timely basis, or at all, or any limitation on our ability to export or sell our products or to obtain any required licenses would adversely affect our business, financial condition and results of operations.

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In March 2021, the U.S. Department of Commerce enacted new regulations on Information and Communications Technology and Services (“ICTS”) which could result in new licensing requirements or delays or restrictions on the U.S. import of some of our foreign-made products.

In May 2019, BIS added Huawei and certain affiliates its Entity List. Absent a license, this action prevents Huawei from purchasing products, software and technology that are subject to U.S. Export Administration Regulations ("EAR"). We are committed to EAR compliance in each of the locations in which we do business. To ensure compliance, we immediately suspended shipments to Huawei and began a systematic assessment of our products sold to Huawei to determine how these products are, or are not, subject to the restrictions resulting from the Entity List. This suspension had an immediate impact on our products shipments to Huawei in the second quarter of 2019, which significantly affected our revenue for the second quarter and the remainder of 2019 and into 2020.

Due to the additional actions of BIS in August 2020, we halted shipments to Huawei after September 14, 2020 and simultaneously removed Huawei revenue from our operating plan while we conducted a systemic assessment of the impact of the new regulations on our products and production methods. The loss of revenue from Huawei in the three month periods ended December 31, 2020 and March 31, 2021 had a material adverse impact on our revenues and financial results, and we have taken actions to adjust our business. Further BIS or other government actions may adversely affect our ability to sell any products to Huawei.

Additionally, in May 2020, BIS added Fiberhome to the Entity List, which became effective in June 2020. This denies Fiberhome the ability to purchase products, software and technology that are subject to EAR. For Fiberhome, we determined that certain of our products are not subject to EAR regulations and may be lawfully sold to Fiberhome. As a result, shipments of those products have continued. Further BIS actions with regard to Fiberhome may adversely affect our ability to sell products to Fiberhome.

Starting in mid-2019, U.S. government allowed companies to apply for temporary export licenses for products subject to EAR and stated that these licenses might be granted if the product was deemed not to be a risk to national security. On occasion, we submit license applications for certain products and associated technology having elements subject to EAR. There can be no assurance as to which products or technology may qualify for a license, or that any such licenses will be granted in a timely manner or at all. Furthermore, there can be no assurance that the U.S. government will not challenge our determination of which products and associated technology are not subject to the EAR regulations.

Even if we are legally able to sell the same types of products we have sold historically, Huawei may decide not to purchase these products for various reasons, including to reduce its own risks of being exposed to disruptions of its supply chain.

Continued tension in U.S.-China trade relations may adversely impact our business and operating results.

Beyond the BIS actions affecting our sales to Huawei, the U.S. government has taken certain other actions in the past several years that impact U.S.-China trade relations, including recently-imposed tariffs affecting certain products manufactured in China. Some products manufactured by our Chinese affiliates are subject to tariffs if imported into the United States. In addition, the China government has taken certain reciprocal actions, including tariffs, which affect certain products manufactured in the United States. Certain of our products manufactured in our U.S. operations were included in the tariffs imposed on imports into China from the United States. As of March 2020, tariffs on most of the products we imported into China have been eliminated. However, there can be no assurance that China will not re-impose these or similar tariffs, impose export restrictions, or take other retaliatory trade actions that may have a material impact on our business.

On December 1, 2020, the Chinese government implemented a new Export Control Law (“ECL”) which regulates the export of certain technologies outside of China. As currently implemented, the ECL does not apply to our products and is not expected to impact our business; however the ECL could be amended in the future in a way that could adversely affect our business.

It is unknown whether and to what extent additional new tariffs or other new laws or regulations will be adopted that increase the cost of importing products to or from the United States, or from China to the United States. Further, it is unknown what effect that any such new tariffs or retaliatory actions would have on us or our industry and customers. As additional new tariffs, legislation and/or regulations are implemented, or if existing trade agreements are renegotiated or if China or other affected countries take retaliatory trade actions, such changes could have a material adverse effect on our business, financial condition, results of operations or cash flows.

In response to trade tensions, the Chinese government and/or individual Chinese customers may take steps to reduce their supply chain dependence on products from U.S. suppliers through their own internal developments or the selection of non-U.S. suppliers, placing us at a commercial disadvantage and potentially affecting our business.

We face intense competition which could negatively impact our results of operations and market share.

The communications networks industry is highly competitive. Our competitors range from large international companies offering a wide range of products to smaller companies specializing in niche products.

Some of our competitors have substantially greater name brand recognition, technical, financial, and marketing resources, and greater manufacturing capacity, as well as better-established relationships with customers, than we do. Some of
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our competitors have more resources to develop or acquire, and more experience in developing or acquiring, new products and technologies. Some of our competitors may be able to develop new products more quickly than us, may be able to develop products that are more reliable or which provide more functionality than ours, and may be able to ramp production faster than we can. In addition, some of our competitors have the financial resources to offer competitive products at below-market pricing levels that could prevent us from competing effectively and result in a loss of sales or market share or cause us to lower prices for our products.

We also face competition from some of our customers who evaluate our capabilities against the merits of manufacturing products internally. Due to the fact that such customers are not seeking to make a comparable profit directly from the manufacture of these products or for other reasons, they may have the ability to provide competitive products at a lower total cost than we would charge such customers. As a result, these customers may purchase less of our products and there would be additional pressure to lower our selling prices which, accordingly, would negatively impact our revenue and gross margin.

Customer demand is difficult to accurately forecast and, as a result, we may be unable to optimally match production with customer demand.

We make planning and spending decisions based on our estimates of customer requirements. The short-term nature of commitments by many of our customers, and the possibility of unexpected changes in demand for their products, reduce our ability to accurately estimate future customer requirements. A sudden reduction in customer demand due to market downturns or other reasons would have a material adverse effect on our operating results, as occurred in 2017, because many of our costs and operating expenses are relatively fixed.

On the other hand, customers may require rapid increases in production, which can strain our resources, cause our manufacturing to be negatively impacted by materials shortages, necessitate higher or more restrictive procurement commitments, increase our manufacturing yield loss and scrapping of excess materials, result in delayed shipments and/or reduce our gross margins. We may not have sufficient capacity at any given time to meet the volume demands of our customers, and we may have difficulty expanding our manufacturing operations on a timely basis to meet increasing customer demand. Additionally, one or more of our suppliers may not have sufficient capacity at any given time to meet our volume demands. Any inability to meet customer demands for rapid increases in production in the future could have a material adverse effect on our business, financial condition, results of operations and prospects.

We may need to raise additional capital in order to pursue our business strategies or maintain our operations, and we may not be able to obtain capital when desired on favorable terms, if at all, or without dilution to our stockholders.

We believe that our existing cash and cash equivalents, and cash flows from our operating activities and funds available under our credit facilities will be sufficient to meet our anticipated cash needs for at least the next 12 months. However, we operate in an industry that makes our prospects difficult to evaluate. It is possible that we may not generate sufficient cash flow from operations or otherwise have the capital resources to meet our future capital needs. If this occurs, we may need additional financing to continue operations or execute on our current or future business strategies, including to:

investInvest in our research and development efforts (particularly in the Cloud and data center interconnect market segments), including by hiring additional technical and other personnel;

maintainMaintain and expand our operating or manufacturing infrastructure;infrastructure (particularly for our Cloud and data center products);

acquireAcquire complementary businesses, products, services or technologies; or

otherwiseOtherwise pursue our strategic plans and respond to competitive pressures.

We do not know with certainty what forms of financing, if any, will be available to us. If financing is not available on acceptable terms, if and when needed, our ability to fund our operations, enhance our research and development and sales and marketing functions, develop and enhance our products, respond to unanticipated events, including unanticipated opportunities, or otherwise respond to competitive pressures could be adversely impacted.

If we incur additional indebtedness through arrangements such as credit agreements or term loans, such arrangements may impose restrictions and covenants that limit our ability to respond appropriately to market conditions, make capital investments or take advantage of business opportunities. In addition, any additional debt arrangements we may enter into would likely require us to make regular interest payments, which could adversely affect our results of operations.

We depend upon outside contract manufacturers for a portion of the manufacturing process for some of our products. Our operations and revenue related to these products could be adversely affected if we encounter problems with any such contract manufacturer.

While many of our products are manufactured internally, we also rely upon contract manufacturers in Thailand, China, Japan, other Asia locations, and Canada to provide back-end manufacturing and production of some of our products. Our reliance on contract manufacturers for some of our products makes us vulnerable to possible production capacity constraints, reduced control over their supply chains, delivery schedules, manufacturing yields, manufacturing quality controls and costs. If one of our contract manufacturers is unable to meet all of our customer demand in a timely fashion, whether due to their direct
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operating control, due to their supply chain or due to the Covid-19 pandemic or other factors, this could have a material adverse effect on the revenue from our products.

We have had a history of losses, we returned to losses in the fourth quarter of 2020, and we expect losses to recur in the future.

We have had a history of losses and we may incur additional losses in future periods. As of June 30, 2021, our accumulated deficit was $447.0 million. Due to the actions of BIS in August 2020, we decided to remove Huawei revenue from our operating plan while we conducted a systemic assessment of the impact of the new regulations on our products and production methods. As a result of this decision, we incurred losses in the first quarter of 2021 and we expect that we will continue incur further losses in 2021 due to the expected reduction in sales to Huawei.

We continue to review our expenditures related to the ongoing operations of our business for their effectiveness. We plan to make adjustments to our expenditures as needed. These include expenditures related to the sales, marketing and development of our products and to maintain our manufacturing facilities and research and development operations. Operations and assets that are deemed to be less effective have been and may in the future be subject to restructuring, which could lead to increased operating losses in future periods when and if restructuring charges are incurred.

Our future results of operations may be subject to volatility as a result of exposure to fluctuations in foreign exchange rates, primarily the Chinese Renminbi (RMB) and Japanese Yen (JPY) exchange rates.

We are exposed to foreign exchange risks. Foreign currency fluctuations may adversely affect our revenue and our costs and expenses, and hence our results of operations. A substantial portion of our business is conducted through our subsidiaries based in China, whose functional currency is the RMB, and in Japan, whose functional currency is the JPY. The value of the RMB against the U.S. dollar and other currencies and the value of the JPY against the U.S. dollar and other currencies fluctuate and are affected by, among other things, changes in political and economic conditions.

To the extent that transactions by our subsidiaries in China and Japan are denominated in currencies other than the RMB and JPY, we bear the risk that fluctuations in the exchange rates of the RMB and JPY in relation to other currencies could decrease our revenue or increase our costs and expenses, therefore having an adverse effect on our future results of operations.

While we generate a significant portion of our revenue in U.S dollars, a significant portion of our cost of goods sold are in RMB and JPY. Therefore appreciation in RMB and JPY against the U.S. dollar would negatively impact our cost of goods sold upon translation to U.S. dollars.

From mid-2016 to mid-2018, we entered into hedging transactions to reduce the short-term impact of foreign currency fluctuations. During the second half of 2018, we discontinued entering into foreign currency forward contracts. This may increase the risks to us arising from the short-term impact of foreign currency fluctuations. If we resume using hedging transactions to reduce our risks in this area, the availability and effectiveness of these hedging transactions may be limited and we may not be able to successfully hedge our exposure. In addition, our currency exchange variations may be magnified by Chinese exchange control regulations that restrict our ability to convert RMB into foreign currency.

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Customer demand is difficult to accurately forecast and, as a result, we may be unable to optimally match production with customer demand.

We make planning and spending decisions based on our estimates of customer requirements. The short-term nature of commitments by many of our customers, and the possibility of unexpected changes in demand for their products, reduce our ability to accurately estimate future customer requirements. A sudden reduction in customer demand due to market downturns or other reasons would have a material adverse effect on our operating results, as occurred in 2017, because many of our costs and operating expenses are relatively fixed.

On the other hand, on occasion, customers may require rapid increases in production, which can strain our resources, cause our manufacturing to be negatively impacted by materials shortages, necessitate higher or more restrictive procurement commitments, increase our manufacturing yield loss and scrapping of excess materials, result in delayed shipments and/or reduce our gross margins. We may not have sufficient capacity at any given time to meet the volume demands of our customers, and we may have difficulty expanding our manufacturing operations on a timely basis to meet increasing customer demand. Additionally, one or more of our suppliers may not have sufficient capacity at any given time to meet our volume demands. Any inability to meet customer demands for rapid increases in production in the future could have a material adverse effect on our business, financial condition, results of operations and prospects.

We are under continuous pressure to reduce the prices of our products, which has adversely affected, and may continue to adversely affect, our gross margins.

The communications networks industry has been characterized by declining product prices over time as technological advances increase price andimprove performance of new products and put pressure on existing products.products to reduce prices. We have reduced the prices of many of our products in the past, most often during annual end-of-year price negotiation. We expect pricing pressure for our products to continue, including from our major customers.continue. To maintain or increase their market share, our competitors also reduce prices of their products each year. In addition, our customers may seek to internally develop and manufacture competing products at a lower cost than we would otherwise charge, which would add additional pressure on us to lower our selling prices. If we are unable to offset any future reductions in our average selling prices by increasing our sales volume, reducing our costs or introducing new products, our gross margin would be adversely affected.

The majority of our customer contracts do not commit customers to specified buying levels, and many of our customers may decrease, cancel or delay their buying levels at any time with little or no advance notice to us.

Our products are typically sold pursuant to individual purchase orders or by use of a vendor-managed inventory ("VMI"), model, which is a process by which we ship agreed quantities of products to a customer-designated location and those products remain our inventory and we retain the title and risk of loss for those products until the customer takes possession of the products. Our customers are typically not contractually committed to buy any quantity of products beyond firm purchase orders. Many of our customers may increase, decrease, cancel or delay purchase orders already in place, which may impact our level of business.

*We may be subject to disruptions or failures in information technology systems and network infrastructures that could have a material adverse effect on our business and financial condition.

We rely on the efficient and uninterrupted operation of complex information technology systems and network infrastructures to operate our business. A disruption, infiltration or failure of our information technology systems as a result of software or hardware malfunctions, system implementations or upgrades, computer viruses, cyber-attacks, third-party security breaches, employee error, theft or misuse, malfeasance, power disruptions, natural disasters or accidents could cause breaches of data security, loss of intellectual property and critical data and the release and misappropriation of sensitive competitive information and partner, customer and employee personal data. Any of these events could harm our competitive position, result in a loss of customer confidence, cause us to incur significant costs to remedy any damages and ultimately materially adversely affect our business and financial condition.

In December 2020, we discovered that we were affected by the Solar Winds Corporation cybersecurity breach; however our comprehensive review by an internal information security group and a third party cybersecurity investigator found no evidence of any suspicious activity on our networks or of any compromise to our data.

Despite using updated security measures, our systems may continue to be vulnerable to cyber security attacks or breaches. While we continually work to safeguard our internal network systems, processes, procedures, and user training to mitigate these potential risks, there is no assurance that these measures will be sufficient to prevent future cyber-attacks. Because security incidents are often not detected immediately, we also may face difficulties or delays in identifying or responding to security breaches and security-related incidents. Additionally, if we discover a threat and take remediation efforts,
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there may be compromises to our data that our investigation did not uncover or additional undiscovered malware on our networks which could result in further breaches of data security or interruptions of our information technology systems.

The Covid-19 pandemic has and could further harm our operations and our financial operations.

Our operations and supply chain are and could continue to be impacted by the implications of the Covid-19 pandemic, which could harm our future revenue and financial condition and increase our costs and expenses. Our manufacturing operations in Silicon Valley, California; Tokyo, Japan; and Shenzhen and Dongguan, China have been affected and could continue to be affected with actions such as being temporarily shut down, requiring longer lead times or being subject to logistics issues. The same issues could impact key suppliers in Patumthanee, Thailand, and Ottawa, Canada and other locations throughout United States and Asia. The efficiency of our business operations (including sales and research and development) could also be reduced as a result of compliance with shelter-in-place orders in Silicon Valley, California; Ottawa, Canada; and Shenzhen and Wuhan, China.

Similarly, our worldwide operations could be subject to secondary effects of the pandemic. Even if our facilities are not directly affected, the pandemic and its effects could substantially disrupt the business of our suppliers or customers, which could have a material adverse effect on us.

Accordingly, we may experience significant disruptions as a result of the Covid-19 pandemic that could materially impact our business, including:

Slower customer deployments of systems using our products due to uncertainty in the business climate;

Reduced demand for our products;

Disruptions of the supply chain of components needed for our products; and

Disruptions of our ability to conduct sales, marketing, product development and other important business activities.

The extent to which the Covid-19 pandemic will continue to impact our business will depend on future developments, which are highly uncertain and cannot be predicted with confidence, such as the duration of the outbreak, travel restrictions, governmental mandates issued to mitigate the spread of the disease, business closures, economic disruptions, and the effectiveness of actions taken to contain and treat the virus. Accordingly, we expect the Covid-19 pandemic may have a negative impact on our sales and our results of operations, the size and duration of which are difficult to predict. We are not insured against major public health events, including the Covid-19 pandemic.

To the extent the Covid-19 pandemic adversely affects our business and financial results, it may also have the effect of heightening many of the other risks described in this ‘‘Risk Factors’’ section, such as reduced spending for communications networks, fluctuations in customer demand, manufacturing and supply constraints, and our ability to raise capital (if necessary).

If we fail to retain our key personnel or if we fail to attract additional qualified personnel, we may not be able to achieve our anticipated growth and our business could suffer.

Our success and ability to implement our business strategy depends upon the continued contributions of our senior management team and others, including senior management in foreign subsidiaries and our technical and operations employees in all locations. Our future success depends, in part, on our ability to attract and retain key personnel, including our senior management and others. The loss of services of members of our senior management team or key personnel or the inability to continue to attract and retain qualified personnel could have a material adverse effect on our business. Competition for highly skilled technical and operations people where we operate is extremely intense, and we continue to face challenges identifying, hiring and retaining qualified personnel in many areas of our business.

We have had a history of losses which may recur in the future.

We have had a history of losses and we may incur additional losses in future periods. As of June 30, 2020, our accumulated deficit was $402.5 million. We continue to review our expenditures related to the ongoing operations of our business for their effectiveness. These include expenditures related to the sales, marketing and development of our products and to maintain our manufacturing facilities and research and development operations. Operations and assets that are deemed to be less effective may be subject to restructuring, which could lead to increased operating losses in future periods when and if restructuring charges are incurred.

*We depend upon outside contract manufacturers for a portion of the manufacturing process for some of our products. Our operations and revenue related to these products could be adversely affected if we encounter problems with any such contract manufacturer.

While many of our products are manufactured internally, we also rely upon contract manufacturers in Thailand, China, Japan and other Asia locations and Ontario (Canada) to provide back-end manufacturing and production of some of our products. Our reliance on contract manufacturers for some of our products makes us vulnerable to possible production capacity constraints, reduced control over their supply chains, delivery schedules, manufacturing yields, manufacturing quality/controls and costs. If one of our contract manufacturers is unable to meet all of our customer demand in a timely fashion, whether due to
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their direct operating control, due to their supply chain or due to the Covid-19 pandemic, this could have a material adverse effect on the revenue from our products.

The majority of our customer contracts do not commit customers to specified buying levels, and many of our customers may decrease, cancel or delay their buying levels at any time with little or no advance notice to us.

Our products are typically sold pursuant to individual purchase orders or by use of a vendor-managed inventory, or VMI, model, which is a process by which we ship agreed quantities of products to a customer-designated location and those products remain our inventory and we retain the title and risk of loss for those products until the customer takes possession of the products. Our customers are typically not contractually committed to buy any quantity of products beyond firm purchase orders. Many of our customers may increase, decrease, cancel or delay purchase orders already in place, which may impact our level of business.

We may be exposed to costs or losses from product lines that we intend to exit or may undertake divestiture of portions of our business that require us to continue providing substantial post-divestiture transition services and support, which may cause us to incur unanticipated costs and liabilities and adversely affect our financial condition and results of operations.

We have a strategy to exit products that have been declining in revenue and have lower gross margins than our other higher speed products. For instance, in January 2017, we completed the sale of assets and transfer of certain liabilities of our access network and low speed transceiver product lines (the “Low Speed Transceiver Products”) and in January 2019 we announced the end-of-life of certain client transceiver modules and discontinued the manufacture and sale of those products after completing final production in May 2019. We may incur additional costs in connection with the sale or end-of-life of these products, or other products and/or facilities in the future, and our revenues and net income could be negatively affected,impacted, particularly in the short term, in connection with the end-of-life or sales of such products and/or facilities. It is also possible that we could incur continued costs or liabilities after the end-of-life process is completed, which could have a material adverse effect on our financial condition or operating results.

Spending for communications networks is cyclical in nature, and any future downturn may reduce demand for our products and revenue.

Our future success as a provider of components, modules and subsystems to leading network equipment vendors depends on continued capital spending on global communications networks. Network traffic has experienced rapid growth driven primarily by bandwidth-intensive content, including cloud services, mobile video and data services, wireless 4G/LTE and now 5G services, social networking, video conferencing and other multimedia. This growth is intensified by the proliferation of fixed and wireless devices that are enabling consumers to access content at increasing data rates anytime and anywhere. Our
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future success depends on continued demand for high-bandwidth, high speedhigh-speed communications networks and the ability of network equipment vendors and carrier data center operators to fulfill this demand. While we believe the long term prospects for growth in data traffic remain strong, especially in Cloud and data center markets,interconnect market segments, our business and financial results will suffer if growth does not occur as expected.

The markets for communications networks may beand network equipment is cyclical and characterized by rapid technological change, price erosion, evolving standards and wide fluctuations in product supply and demand. In the past, including recently to varying degrees in China, the U.S. and Europe, these markets have experienced significant downturns, often connected with, or in anticipation of, the maturation of product cycles for both manufacturers’ and their customers’ products or in response to over or under purchasing of inventory by our customers relative to ultimate carrierend user demand, and with declining general economic conditions. These downturns have been characterized by diminished product demand, production overcapacity, high inventory levels and accelerated erosion of average selling prices. Our historical results of operations have been subject to substantial fluctuations as a result of market downturns and changes in capital spending, and we may experience substantial period-to-period fluctuations in future results of operations.

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Our solutions for the Cloud and data center market segments may not achieve broader market acceptance, which would prevent us from increasing our revenue and market share.

Part of our overall strategy is to continue to expand our optoelectronic solutions for the highest speed Cloud and data center market segments. If we fail to achieve broader acceptance of our products in the Cloud and data center markets, there would be an adverse impact on our ability to increase our revenue, gain market share and achieve and sustain profitability. Our ability to achieve broader market acceptance for our products will be impacted by a number of factors, but not limited to:

our ability to produce optoelectronic solutions for 100G to 800G and beyond that compete favorably against other solutions on the basis of price, quality, reliability and performance;

our ability to timely introduce and complete new designs and timely qualify and certify our products;

whether major Cloud and hyper-scale data center operators will adopt our solutions, which are based on a new network architecture and have a limited history in these market segments;

our ability to develop products that comply with applicable standards and regulatory requirements, as well as potential in-country manufacturing requirements; and;

our ability to develop and maintain successful relationships with our customers and suppliers.

If the Cloud and data center market segments fail to grow as expected, or if demand for our solutions in these segments fails to materialize, our business, financial condition, results of operations and prospects would suffer.

Risks associated with international sales and operations could adversely affect our business and financial results.

We derive a significant portion of our revenue from international sales in various markets, and we have substantial operations in China, Japan and Thailand in addition to the U.S. Our international revenue and operations are subject to a number of material risks, including, but not limited to:

difficultiesDifficulties in staffing, managing and supporting operations across different jurisdictions;

difficultiesDifficulties in enforcing agreements and collecting receivables through foreign legal systems;

fewerFewer legal protections for intellectual property in foreign jurisdictions;

internationalInternational trade restrictions;

difficultiesDifficulties in obtaining any necessary governmental authorizations for the export of our products to certain foreign jurisdictions;

impositionImposition of export restrictions on sales to any of our major foreign customers;

fluctuationsFluctuations in foreign economies and fluctuations in the value of foreign currencies and interest rates;

majorMajor health events, such as outbreaks of contagious disease;

domesticDomestic and international economic or political changes, hostilities and other disruptions; and

difficultiesDifficulties and increased expenses in complying with a variety of U.S. and foreign laws, regulations and trade standards, including the Foreign Corrupt Practices Act and international labor standards.

Negative developments in any of these areas in China, Japan, Canada, Thailand or other countries could result in a reduction in demand for our products, the cancellation or delay of orders already placed, difficulties in producing and delivering our products, threats to our intellectual property, difficulty in collecting receivables, higher labor costs and a higher cost of doing business.

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In addition, although we maintain an anti-corruption compliance program throughout our company, violations of our compliance program may result in criminal or civil sanctions, including material monetary fines, penalties and other costs against us or our employees, and may have a material adverse effect on our business.

Our revenues and costs will fluctuate over time, making it difficult to predict our gross margins and future results of operations.

Our revenue, gross margin and results of operations have varied significantly and are likely to continue to vary from quarter to quarterquarter-to-quarter due to a number of factors, many of which are not within our control. We may not be able to maintain or
improve our gross margins because of slow introductions of new products, pricing pressure from increased competition, failure to effectively reduce the cost of existing products, failure to improve our product mix, future macroeconomic or market volatility reducing sales volumes, changes in customer demand (including a change in product mix among different areas of our business) or other factors. Our gross margins can also be adversely affected for reasons including, but not limited to, fixed manufacturing costs that would not be expected to decrease in proportion to any decrease in revenues; unfavorable production yields or variances; increases in costs of input parts and materials; the timing of movements in our inventory balances; warranty costs and related returns; changes in foreign currency exchange rates; possible exposure to inventory valuation reserves; and other increases in our costs and expenses, including as a result of rising labor costs in China. Such significant increases in costs without corresponding increases in revenue would materially and adversely affect our business, our results of operations and our financial condition and our gross margins.

Our revenues are typically subject to seasonality.

Our first quarter revenue is typically seasonally lower than the rest
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Table of the year primarily due to annual price negotiations with customers that occur at the end of the prior year and lower capacity utilization during the annual new year holidays in China. This historical pattern typically adversely affects our revenues in the first quarter of each year and impacts the typical annual distribution of revenue from quarter to quarter through the year. That said, our first quarter revenue varies markedly year to year so should not be considered a reliable indicator of our future revenue or financial performance. In Q2 2020, this seasonality was higher due to the China central government extending the annual new year holidays in China in an effort to contain impact of the novel coronavirus.Contents

If our customers do not qualify our products for use, then our results of operations may suffer.

Prior to placing volume purchase orders with us, most of our customers require us to obtain their approval called qualification in our industry of our new and existing products, and our customers often audit our manufacturing facilities and perform other vendor evaluations during this process. The qualification process involves product sampling and reliability testing and collaboration with our product management and engineering teams in the design and manufacturing stages. If we are unable to qualify our products with customers, then our revenue would be lower than expected and we may not be able to recover the costs associated with the qualification process which would have an adverse effect on our results of operations.

In addition, due to evolving technological changes in our markets, a customer may cancel or modify a design project before we have qualified our product or begun volume manufacturing of a qualified product. It is unlikely that we would be able to recover the expenses for cancelled or unutilized custom design projects.

Covenants in our borrowing arrangements may limit our flexibility in responding to business opportunities and competitive developments and increase our vulnerability to adverse economic or industry conditions.

We have lending arrangements with several financial institutions, which generally require us to maintain certain financial covenants and limit our ability to take certain actions such as incurring some kinds of additional debt, paying dividends, or engaging in certain transactions like mergers and acquisitions, investments and asset sales without the lenders’ consent. These restrictions may limit our flexibility in responding to business opportunities, competitive developments and adverse economic or industry conditions. In addition, a breach of any of these covenants, or a failure to pay interest or indebtedness when due under any of our credit facilities, could result in a variety of adverse consequences, including the acceleration of our indebtedness.

We may be involved in intellectual property disputes, which could divert management’s attention, cause us to incur significant costs and prevent us from selling or using the challenged technology.

Participants in the markets in which we sell our products have experienced frequent litigation regarding patent and other intellectual property rights. Numerous patents in these industries are held by others, including our competitors. In addition,
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from time to time, we have been notified that we may be infringing certain patents or other intellectual property rights of others.others (for example, see our discussion on the Finisar dispute). Regardless of their merit, responding to such claims can be time consuming, divert management’s attention and resources and may cause us to incur significant expenses. In addition, there can be no assurance that third parties will not assert infringement claims against us, whether or not such claims are valid. While we believe that our products do not infringe in any material respect upon intellectual property rights of other parties and/or meritorious defense would exist with respect to any assertions to the contrary, we cannot be certain that our products would not be found infringing the intellectual property rights of others.

In January 2010, Finisar Corporation, or Finisar (which was acquired by II-VI, Inc. in September 2019), filed a complaint in the U.S. District Court for the Northern District of California against us and three other co-defendants. In the complaint, Finisar alleged infringement of certain of its U.S. patents arising from the co-defendants’ respective manufacture, importation, use, sale of or offer to sell certain optical transceiver products in the U.S. In May 2012, we and Finisar agreed to toll our respective claims until the refiling of certain of the previously asserted claims from this dispute. As a result, Finisar/II-VI is permitted to bring a new lawsuit against us if it chooses to do so, and we may bring new claims against Finisar upon seven days written notice prior to filing such claims.

Although we believe that we would have meritorious defenses to the infringement allegations and intend to defend any new similar lawsuit vigorously, there can be no assurance that we will be successful in our defense. Even if we are successful, we may incur substantial legal fees and other costs in defending the lawsuit. Further, a new lawsuit, if brought by either party, would be likely to divert the efforts and attention of our management and technical personnel, which could harm our business.

If we fail to protect our intellectual property and other proprietary rights, our business and results of operations could be materially harmed.

Our success depends to a significant degree on our ability to protect our intellectual property and other proprietary rights. We rely on a combination of patent, trademark, copyright, trade secret and unfair competition laws, as well as license agreements and other contractual provisions, to establish and protect our intellectual property and other proprietary rights. We have applied for patent registrations in the U.S. and in other foreign countries, some of which have been issued. We cannot guarantee that our pending applications will be approved by the applicable governmental authorities.

Similarly we must protect all company data as it pertains to customers, products and product designs, technology and technology related trade secrets, plus customer and supplier and personal data of suppliers, customers and personnel. We rely on a combination of these important data elements to establish and protect multiple aspects of our business, and loss of data, breaching of data or stealing of such data could hard the company.our business.

Policing unauthorized use of our technology is difficult and we cannot be certain that the steps we have taken will prevent the misappropriation, unauthorized use or other infringement of our intellectual property rights. Further, we may not be able to effectively protect our intellectual property rights from misappropriation or other infringement in foreign countries where we have not applied for patent protections, and where effective patent, trademark, trade secret and other intellectual property laws may be unavailable, or may not protect our proprietary rights as fully as U.S. or Japan law. Particularly, our U.S. patents do not afford any intellectual property protection in China, Japan, Canada, Russia or other Asia locations.

In the future, we may need to take legal actions to prevent third parties from infringing upon or misappropriating our intellectual property or from otherwise gaining access to our technology. Protecting and enforcing our intellectual property rights and determining their validity and scope could result in significant litigation costs and require significant time and attention from our technical and management personnel. If we fail to protect our intellectual property and other proprietary rights, or if such intellectual property and proprietary rights are infringed or misappropriated, our business, results of operations or financial condition could be materially harmed.

We may be subject to disruptions or failures in information technology systems and network infrastructures that could have a material adverse effect on our business and financial condition.

We rely on the efficient and uninterrupted operation of complex information technology systems and network infrastructures to operate our business. A disruption, infiltration or failure of our information technology systems as a result of software or hardware malfunctions, system implementations or upgrades, computer viruses, cyber-attacks, third-party security breaches, employee error, theft or misuse, malfeasance, power disruptions, natural disasters or accidents could cause breaches of data security, loss of intellectual property and critical data and the release and misappropriation of sensitive competitive information and partner, customer and employee personal data. Any of these events could harm our competitive position, result in a loss of customer confidence, cause us to incur significant costs to remedy any damages and ultimately materially adversely affect our business and financial condition.
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It could be discovered that our products contain defects that may cause us to incur significant costs, divert our attention, result in a loss of customers and result in product liability claims.

Our products are complex and undergo quality testing as well as formal qualification, both by our customers and by us. For various reasons, such as the occurrence of performance problems that are unforeseeable in testing or that are detected only when products age or are operated under peak stress conditions, our products may fail to perform as expected long after customer acceptance. Failures could result from faulty components or design, problems in manufacturing or other unforeseen reasons. As a result, we could incur significant costs to repair or replace defective products under warranty, particularly when such failures occur in installed systems. Any significant product failure could result in lost future sales of the affected product and other products, as well as customer relations problems and litigation, which could harm our business.

Further, our products contain purchased components including electronic components. It is possible that such purchased items could contain quality defects, manufacturing defects, performance problems or even counterfeit substitutes. Any significant product failure that is the result of such defects could result in lost future sales as well as customer relations problems and litigation, which could harm our business.

The communications networks industry has long product development cycles requiring us to incur product development costs without assurances of an acceptable investment return.

Large volumes of communications equipment and support structures are installed with considerable expenditures of funds and other resources, and long investment return period expectations. At the component supplier level, these cycles create considerable, typically multi-year, gaps between the commencement of new product development and volume purchases. Due to changing industry and customer requirements, we are constantly developing new products, including seeking to further integrate functions on PICs and developing and using new technologies in our products. These development activities
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necessitate significant investment of capital. Our new products often require a long time to develop because of their complexity and rigorous testing and qualification requirements. Accordingly, we and our competitors often incur significant research and development and sales and marketing costs for products that, initially, will be purchased by our customers long after much of the cost is incurred and, in some cases, may never be purchased due to changes in industry or customer requirements in the interim.

Our revenues are typically subject to seasonality.

Our first quarter revenue is typically seasonally lower than the rest of the year primarily due to annual price negotiations with customers that occur at the end of the prior year and lower capacity utilization during the annual new year holidays in China. This historical pattern typically adversely affects our revenues in the first quarter of each year and impacts the typical annual distribution of revenue from quarter-to-quarter through the year. That said, our first quarter revenue varies markedly year- to-year so should not be considered a reliable indicator of our future revenue or financial performance.

If we fail to obtain the right to use the intellectual property rights of others which are necessary to operate our business, and to protect their intellectual property, our business and results of operations will be adversely affected.

From time to time we may choose to, or be required to, license technology or intellectual property from third parties in connection with the development of our products. Failure to obtain a necessary third-party license required for our product offerings or to develop new products and product enhancements could adversely affect our business.

Similarly, from time to time, others may endeavor to infringe on our intellectual property or encroach on our trademarks or other intellectual property. Our failure to identify, recognize and/or action to productprotect such intellectual property could adversely affect our business.

Participation in standards setting organizations may subject us to intellectual property licensing requirements or limitations that could adversely affect our business and prospects.

In the course of our participation in the development of emerging standards for some of our present and future products, we may agree to grant to all other participants a license to our patents that are essential to the practice of those standards on reasonable and non-discriminatory, or RAND, terms. If we fail to limit to whom we license our patents, or fail to limit the terms of any such licenses, we may be required to license our patents or other intellectual property to others in the future, which could limit the effectiveness of our patents against competitors.

Any potential dispute involving our products, services or technology could also include our customers using our products, which could trigger our indemnification obligations to them and result in substantial expenses to us.

In any potential dispute involving allegations that our products, services or technology infringe the intellectual property rights of third parties, our customers could also become the target of litigation. Because we often indemnify our customers for intellectual property claims made against them for products incorporating our technology, any claims against our customers could trigger indemnification obligations in some of our supply agreements, which could result in substantial expenses such as increased legal expenses, product recalls, damages for past infringement or royalties for future use.
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Rapidly changing standards and regulations could make our products obsolete, which would cause our revenue and results of operations to suffer.

We design our products to conform to regulations established by governments and to standards set by industry standards bodies worldwide, such as The American National Standards Institute, the European Telecommunications Standards Institute, the International Telecommunications Union and the Institute of Electrical and Electronics Engineers. Various industry organizations are currently considering whether and to what extent to create standards for elements used in 100Gbps and beyond systems. Because certain of our products are designed to conform to current specific industry standards, if competing or new standards emerge that are preferred by our customers, we would have to make significant expenditures to develop new products and our revenue and results of operations would suffer.

If we fail to maintain effective internal control over financial reporting in the future, the accuracy and timing of our financial reporting may be adversely affected.

Our management is responsible for establishing and maintaining adequate internal control over our financial reporting, as defined in Rule 13a-15(f) under the Securities Exchange Act of 1934, as amended, or the Exchange Act.

Preparing our consolidated financial statements involves a number of complex manual and automated processes, which are dependent upon individual data input or review and require significant management judgment. One or more of these elements may result in errors that may not be detected and could result in a material misstatement of our consolidated financial statements. If we fail to maintain the adequacy of our internal controls over financial reporting, our business and operating results may be harmed and we may fail to meet our financial reporting obligations. If material weaknesses in our internal control are discovered or occur, our consolidated financial statements may contain material misstatements and we could be required to restate our financial results.

Our internal control over financial reporting may not prevent or detect misstatements because of its inherent limitations, including the possibility of human error, the circumvention or overriding of controls, or fraud. Even effective internal controls can provide only reasonable assurance with respect to the preparation and fair presentation of financial statements. Any failure of our internal controls could adversely affect the results of the periodic management evaluations and annual independent registered public accounting firm attestation reports regarding the effectiveness of our internal control over financial reporting. If we cannot provide reliable financial reports or prevent fraud, our business and results of operations could be harmed, investors could lose confidence in our reported financial information, and the trading price of our stock may decline.

We may be unable to utilize our net operating loss carryforwards to reduce our income taxes, which could adversely affect our future financial results.

As of December 31, 2019,2020, we had net operating loss or NOL,("NOL"), carryforwards for U.S. federal and state tax purposes of $290.4$289.4 million and $52.1$52.0 million, respectively. As theseThese net operating losses have not been utilized and may not be utilized prior to their expiration in the future. The utilization of the NOL and tax credit carryforwards are subject to a substantial limitation imposed by Section 382 of the Internal Revenue Code of 1986, as amended, or the Code, and similar state provisions. We recorded deferred tax assets, net of valuation allowance, for the NOL carryforwards currently available after considering the existing Section 382 limitation. If we incur an additional limitation under Section 382, then the NOL carryforwards, as disclosed, could be reduced by the impact of any future limitation that would result in existing NOL carryforwards and tax credit carryforwards expiring unutilized and increases in future tax liabilities.

Natural disasters, terrorist attacks or other catastrophic events could harm our operations and our financial results.

Our worldwide operations could be subject to natural disasters and other business disruptions, which could harm our future revenue and financial condition and increase our costs and expenses. For example, our corporate headquarters and wafer fabrication facility in Silicon Valley, California and our Tokyo, Japan facility are located near major earthquake fault lines, and our manufacturing facilities are located in Shenzhen and Dongguan, China, areas that are susceptible to typhoons. We are not insured against many natural disasters, including earthquakes.

Similarly, our worldwide operations could be subject to secondary effects of natural disasters, terrorist attacks or other catastrophic events. Even if our facilities are not directly affected, any of these types of events could substantially disrupt the business of our suppliers or customers, which could have a material adverse effect on us.

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We are subject to environmental, health and safety laws and regulations, which could subject us to liabilities, increase our costs, or restrict our business or operations in the future.

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Our manufacturing operations and our products are subject to a variety of federal, state, local and international environmental, health and safety laws and regulations in each of the jurisdictions in which we operate or sell our products. Our failure to comply with present and future environmental, health or safety requirements, or the identification of contamination, could cause us to incur substantial costs, including cleanup costs, monetary fines, civil or criminal penalties, or curtailment of operations, which could have a material adverse effect on our business, financial condition and results of operations.

Additionally, increasing efforts to control emissions of greenhouse gases or GHG,("GHG"), may also impact us. Additional climate change or GHG control requirements are under consideration at the federal level in the U.S. and in China. Additional restrictions, limits, taxes, or other controls on GHG emissions could increase our operating costs and, while it is not possible to
estimate the specific impact any final GHG regulations will have on our operations, there can be no assurance that these measures will not have significant additional impact on us.us.

Risks Related to Our Operations in China

Our business operations conducted in China are critical to our success. A significant portion of our revenue was recognized from customers for whom we shipped products to a location in China. Additionally, a substantial portion of our net property, plant and equipment, approximately 23%29% as of June 30, 2020,2021, was located in China. We expect to make further investments in China in the foreseeable future. Therefore, our business, financial condition, results of operations and prospects are to a significant degree subject to economic, political, legal, and social events and developments in China.

A considerable portion of our business outside of the Cloud and data center market segments involves selling high-speed optical components in China and any move to local Chinese vendors for these products might adversely affect our results.

In December 2017, the Chinese Government Ministry of Industry and Information Technology announced a five-year optical component technology roadmap with the aim to reduce China’s dependency on non-domestic companies for high-end optical chips and sub-components, including some products manufactured and sold by us. This announcement continues an ongoing trend in China to build domestic industry in this area. While we believe local Chinese component suppliers do not currently have the capability to supply the highest performance optical chips and sub-components, those companies may over time develop such capability and negatively impact our revenue and financial performance if we do not continue to innovate and maintain our lead in the highest speed and performance optical components.

Adverse changes in economic and political policies in China, or Chinese laws or regulations could have a material adverse effect on business conditions and the overall economic growth of China, which could adversely affect our business.

The Chinese government exercises significant control over China’s economy by way of the allocation of resources, control over foreign currency-denominated obligations and monetary policy and provision of preferential treatment to particular industries or companies. Moreover, the laws, regulations and legal requirements in China, including the laws that apply to foreign-invested enterprises are relatively new and are subject to frequent changes. The interpretation and enforcement of such laws is uncertain. Any adverse changes to these laws, regulations and legal requirements, including tax laws, or their interpretation or enforcement, or the creation of new laws or regulations relating to our business, could have a material adverse effect on our business.

Furthermore, any slowdown or economic downturn, whether actual or perceived, in China could have a material adverse effect on our business, financial condition and results of operation.


Changes in China’s international trade policies may adversely impact our business and operating results.

The China government has recently made statements and taken certain actions thatmay change trade policies including recently-imposedthat impact our operations. Prior to early 2020, the China government imposed tariffs affecting products manufactured in the U.S. Certainon certain of our products manufactured in our U.S. operations have been included in the tariffs imposed on importsand imported into China from the United States. There has been exemption of these tariffs since then. We expect these tariffs, as currentlyif applied without exemption, will increase our cost of goods sold by approximately one percentage point.sold. It is unknown if exemption, or any additional such tariffs or retaliatory actions, will be imposed or what impact they would have on us or our industry and customers. As new tariffs, legislation and/or regulations are implemented, or if existing trade agreements are renegotiated between China and the U.S. or other affected countries, such changes could have a material adverse effect on our business, financial condition, results of operations or cash flows. Furthermore, in response to such trade tensions, the Chinese government and/or individual Chinese customers may take steps to reduce their supply chain dependence on products from U.S. suppliers through their own internal developments or the selection of non-U.S. suppliers, placing us at a commercial disadvantage and potentially affecting our business.

A considerable portion of our business involves selling high speed optical components in China and any move to local Chinese vendors for these products might adversely affect our results.

In December 2017, the Chinese Government Ministry of Industry and Information Technology has announced a five-year optical component technology roadmap with the aim to reduce China’s dependency on non-domestic companies for high-end optical chips and sub-components, including some products manufactured and sold by us. This announcement continues an
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ongoing trend in China to build domestic industry in this area. While we believe local Chinese component suppliers do not currently have the capability to supply the highest performance optical chips and sub-components, those companies may over time develop such capability and negatively impact our revenue and financial performance if we do not continue to innovate and maintain our lead in the highest speed and performance optical components.

Uncertainties with respect to China’s legal system could adversely affect the legal protection available to us.

Our operations in China are governed by Chinese laws and regulations. Our subsidiaries in China are generally subject to laws and regulations applicable to foreign investments in China and, in particular, laws applicable to wholly foreign-owned enterprises. China has not developed a fully-integrated legal system to fully address its transition to a more market-oriented economy, and recently-enacted laws and regulations may not sufficiently cover all aspects of economic activities in China. Uncertainties in the Chinese legal system may impede our ability to enforce the contracts we have entered into with our distributors, business partners, customers and suppliers. In addition, protections of intellectual property rights and confidentiality in China may not be as effective as in the U.S. or other countries or regions with more developed legal systems. All of these uncertainties could limit the legal protections available to us and could materially and adversely affect our business and operations.

Our subsidiaries in China may be subject to restrictions on dividend payments, on making other payments to us or any other affiliated company, and on borrowing or allocating tax losses among our subsidiaries.
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Current Chinese regulations permit our subsidiaries in China to pay dividends only outTable of their accumulated profits, if any, determined in accordance with Chinese accounting standards and regulations, which are different than U.S. accounting standards and regulations. In addition, our subsidiaries in China are required to set aside at least 10% of their respectiveContents
accumulated profits each year, if any, to fund their statutory common reserves until such reserves have reached at least 50% of their respective registered capital. As of June 30, 2020 and December 31, 2019, our Chinese subsidiaries’ common reserves had not reached this threshold and, accordingly, these entities are required to continue funding such reserves with accumulated net profits. Accordingly, we may not be able to move our capital easily, which could harm our business.

Restrictions on currency exchange may limit our ability to use our cash effectively.

In China, the State Administration of Foreign Exchange or SAFE,("SAFE") administers restrictions on currency exchange. These restrictions may limit our ability to use cash held in RMB to fund any business activities we may have outside China or to make dividend payments in U.S. dollars. SAFE or other Chinese regulatory authorities may impose more stringent restrictions on the convertibility of the RMB, especially with respect to foreign exchange transactions. If such restrictions are imposed, our ability to adjust our capital structure or engage in foreign exchange transactions may be limited.

If the Chinese government determines that we failed to obtain approvals of, or registrations with, the requisite Chinese regulatory authority with respect to our current and past import and export of technologies, or failed to obtain the necessary licenses to file patent applications outside China for inventions made in China, we could be subject to sanctions, which could adversely affect our business.

China imposes controls on technology import and export. The term “technology import and export” is broadly defined to include, without limitation, the transfer or license of patents, software and know-how, and the provision of services in relation to technology. Depending on the nature of the relevant technology, the import and export of technology to or from China requires either approval by or registration with, the relevant Chinese governmental authorities. Additionally, the Chinese government requires the patent application for any invention made at least in part in China to be filed first in China, then undergo a government secrecy review and obtain a license before such application is filed in other countries.

If the Chinese government determines that we failed to follow required procedures and obtain the appropriate license before filing a patent application outside China for an invention made at least in part in China, our China patents on such products may be invalidated, which could have a material and adverse effect on our business and operations.

China regulation of loans and direct investment by offshore holding companies to China entities may delay or prevent us from using our cash proceeds to make loans or additional capital contributions to our China subsidiaries.

From time to time, we may make loans or additional capital contributions to our China subsidiaries. We cannot assure that we will be able to obtain these government registrations or approvals on a timely basis, if at all, with respect to our future loans or capital contributions to our China subsidiaries. If we fail to receive such registrations or approvals, our ability to
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capitalize our China subsidiaries may be negatively affected, which could materially and adversely affect our liquidity and ability to fund and expand our business.

Dividends paid to us by our Chinese subsidiaries may be subject to Chinese withholding tax.

The Enterprise Income Tax Law and the implementation regulations provide that a 10% withholding tax may apply to dividends payable to investors that are “non-resident enterprises,” to the extent such dividends are derived from sources within China and in the absence of any tax treaty that may reduce such withholding tax rate.

Our contractual arrangements with our subsidiaries in China may be subject to audit or challenge by the Chinese tax authorities, and a finding that our subsidiaries in China owe additional taxes could substantially reduce our net income and the value of our stockholders’ investment.

Under the applicable laws and regulations in China, arrangements and transactions among related parties may be subject to audit or challenge by the Chinese tax authorities. We would be subject to adverse tax consequences if the Chinese tax authorities were to determine that the contracts with or between our subsidiaries were not executed on an arm’s length basis, and as a result the Chinese tax authorities could require that our Chinese subsidiaries adjust their taxable income upward for Chinese tax purposes. Such an adjustment could adversely affect us by increasing our tax expenses.

We may have difficulty maintaining adequate management, legal and financial controls in China, which we are required to do in order to comply with Section 404 of the Sarbanes-Oxley Act and securities laws, and which could cause a material adverse impact on our consolidated financial statements, the trading price of our common stock and our business.

Our subsidiaries in China are generally subject to our overall obligations to maintain strong corporate governance, internal controls and computer, financial and other control systems. We may have difficulty hiring and retaining employees in China with experience and expertise relating to accounting principles generally accepted in the U.S. and U.S. public-company reporting requirements. These issues could make it more difficult for us to establish and maintain adequate internal control over our financial reporting, which could then result in errors that could cause a material misstatement of our consolidated financial statements.

We may be exposed to liabilities under the FCPA and Chinese anti-corruption laws, and any determination that we violated these laws could have a material adverse effect on our business.

We are subject to the Foreign Corrupt Practices Act of 1977 or FCPA,("FCPA") and other laws that prohibit improper payments or offers of payments to foreign governments and their officials and political parties by U.S. persons and issuers as defined by the statute, for the purpose of obtaining or retaining business. We have operations, agreements with third parties and we make significant sales in China. China also strictly prohibits bribery of government officials. Our activities in China create the risk of unauthorized payments or offers of payments by our employees, consultants, sales agents or distributors, even though they may not always be subject to our control. Although we have implemented policies and procedures to discourage these practices by our employees, our existing safeguards and any future improvements may prove to be less than effective, and our employees, consultants, sales agents or distributors may engage in conduct for which we might be held responsible. Violations of the FCPA or anti-corruption laws in other countries may result in severe criminal or civil sanctions, and we may be subject to other liabilities, which could negatively affect our business, operating results and financial condition.

Risks Related to Ownership of Our Common Stock

Our stock price may be volatile due to fluctuation of our financial results from quarter-to-quarter and other factors.

Our quarterly revenue and results of operations have varied in the past and may continue to vary significantly from quarter to quarter.quarter-to-quarter. This variability may lead to volatility in our stock price as research analysts and investors respond to these quarterly fluctuations. These fluctuations are due to numerous factors, including:

fluctuationsFluctuations in demand for our products;

theThe timing, volume and product mix of sales of our products;

changesChanges in our pricing and sales policies, particularly in the first quarter of the year, or changes in the pricing and sales policies of our competitors;

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changesChanges in government export and import controls that restrict our sales to key customers;

ourOur ability to design, manufacture and deliver products to our customers in a timely and cost-effective manner and that meet customer requirements;

qualityQuality control, yield or other output-related problems in our manufacturing operations;

ourOur ability to timely obtain adequate quantities of the components used in our products;

lengthLength and variability of the sales cycles of our products;

unanticipatedUnanticipated increases in costs or expenses; and

fluctuationsFluctuations in foreign currency exchange rates.

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The foregoing factors are difficult to forecast, and these, as well as other factors, could materially adversely affect our quarterly and annual results of operations in the future. In addition, a significant amount of our operating expenses is relatively fixed in nature due to our internal manufacturing, research and development, sales and general administrative efforts. Any failure to adjust spending quickly enough to compensate for a revenue shortfall could magnify the adverse impact of such revenue shortfall on our results of operations. Moreover, our results of operations may not meet our announced financial outlook or the expectations of research analysts or investors, in which case the price of our common stock could decrease significantly. There can be no assurance that we will be able to successfully address these risks.

The market price of our common stock could be subject to wide fluctuations in response to, among other things, the risk factors described in this section of this Quarterly Report on Form 10-Q, and other factors beyond our control, such as fluctuations in the valuation of companies perceived by investors to be comparable to us.

The stock markets have experienced price and volume fluctuations that have affected and continue to affect the market prices of equity securities of many companies. These fluctuations often have been unrelated or disproportionate to the operating performance of those companies. These broad market and industry fluctuations, as well as general economic, political and market conditions, such as recessions, sovereign debt or liquidity issues, interest rate changes or international currency fluctuations, may negatively affect the market price of our common stock.

In the past, many companies that have experienced volatility in the market price of their stock have been subject to securities class action litigation. We may become the target of this type of litigation in the future. Securities litigation against us could result in substantial costs and divert our management’s attention from other business concerns, which could seriously harm our business.

Our charter documents and Delaware law could prevent a takeover that stockholders consider favorable and could also reduce the market price of our stock.

Our amended and restated certificate of incorporation and our amended and restated bylaws contain provisions that could delay or prevent a change in control of our company. These provisions could also make it more difficult for stockholders to elect directors and take other corporate actions. These provisions include:

providingProviding for a classified board of directors with staggered, three-year terms;

notNot providing for cumulative voting in the election of directors;

authorizingAuthorizing our board of directors to issue, without stockholder approval, preferred stock rights senior to those of common stock;

prohibitingProhibiting stockholder action by written consent;

limitingLimiting the persons who may call special meetings of stockholders; and

requiringRequiring advance notification of stockholder nominations and proposals.
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In addition, we are governed by the provisions of Section 203 of the Delaware General Corporate Law. These provisions may prohibit large stockholders, in particular those owning 15% or more of our outstanding common stock, from engaging in certain business combinations without approval of substantially all of our stockholders for a certain period of time.

These and other provisions in our amended and restated certificate of incorporation, our amended and restated bylaws and under Delaware law could discourage potential takeover attempts, reduce the price that investors might be willing to pay for shares of our common stock in the future and result in the market price being lower than it would be without these provisions.

*Our amended and restated certificate of incorporation provides that the Court of Chancery of the State of Delaware will be the exclusive forum for certain disputes between us and our stockholders, which could limit our stockholders’ ability to obtain a favorable judicial forum for disputes with us or our directors, officers, or employees.

Our amended and restated certificate of incorporation provides that the Court of Chancery of the State of Delaware is the sole and exclusive forum for the following types of actions or proceedings:

anyAny derivative action or proceeding brought on our behalf;

anyAny action asserting a breach of fiduciary duty;

anyAny action asserting a claim against us arising under the Delaware General Corporation Law; and

anyAny action asserting a claim against us that is governed by the internal-affairs doctrine.

This provision would not apply to suits brought to enforce a duty or liability created by the Exchange Act. Furthermore, Section 22 of the Securities Act of 1933, as amended, creates concurrent jurisdiction for federal and state courts over all such Securities Act actions. Accordingly, both state and federal courts have jurisdiction to entertain such claims.
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This exclusive forum provision may limit a stockholder’s ability to bring a claim in a judicial forum that it finds favorable for disputes with us or our directors, officers, or other employees, which may discourage lawsuits against us and our directors, officers and other employees. If a court were to find the exclusive-forum provision in our amended and restated certificate of incorporation to be inapplicable or unenforceable in an action, we may incur additional costs associated with resolving the dispute in other jurisdictions, which could seriously harm our business.

General Risks

If we fail to maintain effective internal control over financial reporting in the future, the accuracy and timing of our financial reporting may be adversely affected.

Our management is responsible for establishing and maintaining adequate internal control over our financial reporting, as defined in Rule 13a-15(f) under the Securities Exchange Act of 1934, as amended, or the Exchange Act.

Preparing our consolidated financial statements involves a number of complex manual and automated processes, which are dependent upon individual data input or review and require significant management judgment. One or more of these elements may result in errors that may not be detected and could result in a material misstatement of our consolidated financial statements. If we fail to maintain the adequacy of our internal controls over financial reporting, our business and operating results may be harmed and we may fail to meet our financial reporting obligations. If material weaknesses in our internal control are discovered or occur, our consolidated financial statements may contain material misstatements and we could be required to restate our financial results.

Our internal control over financial reporting may not prevent or detect misstatements because of its inherent limitations, including the possibility of human error, the circumvention or overriding of controls, or fraud. Even effective internal controls can provide only reasonable assurance with respect to the preparation and fair presentation of financial statements. Any failure of our internal controls could adversely affect the results of the periodic management evaluations and annual independent registered public accounting firm attestation reports regarding the effectiveness of our internal control over financial reporting. If we cannot provide reliable financial reports or prevent fraud, our business and results of operations could be harmed, investors could lose confidence in our reported financial information, and the trading price of our stock may decline.

Natural disasters, terrorist attacks or other catastrophic events could harm our operations and our financial results.

Our worldwide operations could be subject to natural disasters and other business disruptions, which could harm our future revenue and financial condition and increase our costs and expenses. For example, our corporate headquarters and wafer fabrication facility in Silicon Valley, California and our Tokyo, Japan facility are located near major earthquake fault lines, and our manufacturing facilities are located in Shenzhen and Dongguan, China, areas that are susceptible to typhoons. We are not insured against many natural disasters, including earthquakes.

Similarly, our worldwide operations could be subject to secondary effects of natural disasters, terrorist attacks or other catastrophic events. Even if our facilities are not directly affected, any of these types of events could substantially disrupt the business of our suppliers or customers, which could have a material adverse effect on us.
ITEM 2.    UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS  
None. 
ITEM 3.    DEFAULTS UPON SENIOR SECURITIES  
None.
ITEM 4.    MINE SAFETY DISCLOSURES
Not applicable.
ITEM 5.    OTHER INFORMATION
None.
 
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ITEM 6.    EXHIBITS

Exhibit
no.
Exhibit DescriptionFormSEC File No.ExhibitFiling DateFiled herewith
Form 8-K001-350613.1February 10, 2011
Form S-1/A333-1660963.5November 22, 2010
Form 8-K001-3506199.1June 4, 2020
X
  X
  X
  X
101.INS Inline XBRL Instance Document. X
101.SCH Inline XBRL Taxonomy Extension Schema Document. X
101.CAL Inline XBRL Taxonomy Extension Calculation Linkbase Document. X
101.DEF Inline XBRL Taxonomy Extension Definition Linkbase Document. X
101.LAB Inline XBRL Taxonomy Extension Label Linkbase Document. X
101.PRE Inline XBRL Taxonomy Extension Presentation Linkbase Document.   X
104Cover Page Interactive Data File (formatted in Inline XBRL and contained in Exhibit 101)
Exhibit
no.
Exhibit DescriptionFormSEC File No.ExhibitFiling DateFiled herewith
Form 8-K001-350613.1February 10, 2011
Form S-1/A333-1660963.5November 22, 2010
Form 8-K001-3506110.1June 22, 2021
Form 8-K001-3506110.2June 22, 2021
Form 8-K001-3506110.1July 2, 2021
X
  X
  X
  X
101.INS Inline XBRL Instance Document. X
101.SCH Inline XBRL Taxonomy Extension Schema Document. X
101.CAL Inline XBRL Taxonomy Extension Calculation Linkbase Document. X
101.DEF Inline XBRL Taxonomy Extension Definition Linkbase Document. X
101.LAB Inline XBRL Taxonomy Extension Label Linkbase Document. X
101.PRE Inline XBRL Taxonomy Extension Presentation Linkbase Document.   X
104Cover Page Interactive Data File (formatted in Inline XBRL and contained in Exhibit 101)

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SIGNATURE  
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. 
 NeoPhotonics Corporation
  
Date:August 5, 20203, 2021By:/S/ ELIZABETH EBY
  Elizabeth Eby
  Senior Vice President, Finance and Chief Financial Officer
  (Principal Financial and Accounting Officer)
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