Filed 14 May 19

Document and Entity Information

Document and Entity Information - shares3 Months Ended
Mar. 31, 2019Apr. 30, 2019
Document Information [Line Items]
Entity Registrant NameBloom Energy Corp
Entity Central Index Key0001664703
Current Fiscal Year End Date--12-31
Entity Filer CategoryNon-accelerated Filer
Document Type10-Q
Document Period End DateMar. 31,
2019
Document Fiscal Year Focus2019
Document Fiscal Period FocusQ1
Amendment Flagfalse
Entity Emerging Growth Companytrue
Entity Small Businessfalse
Entity Ex Transition Periodfalse
Class A common stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding60,021,168
Class B common stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding53,543,216

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (unaudited) - USD ($) $ in ThousandsMar. 31, 2019Dec. 31, 2018
Current assets:
Cash and cash equivalents[1] $ 320,414 $ 220,728
Restricted cash[1]18,419 28,657
Short-term investments0 104,350
Accounts receivable[1]84,070 84,887
Inventories116,544 132,476
Deferred cost of revenue66,316 62,147
Customer financing receivable[1]5,717 5,594
Prepaid expense and other current assets[1]28,362 33,742
Total current assets639,842 672,581
Property, plant and equipment, net[1]475,385 481,414
Customer financing receivable, non-current[1]65,620 67,082
Restricted cash, non-current[1]31,101 31,100
Deferred cost of revenue, non-current72,516 102,699
Other long-term assets[1]34,386 34,792
Total assets1,318,850 1,389,668
Current liabilities:
Accounts payable[1]64,425 66,889
Accrued warranty16,736 19,236
Accrued other current liabilities[1]67,966 69,535
Deferred revenue and customer deposits[1]89,557 94,158
Current portion of recourse debt15,683 8,686
Current portion of non-recourse debt[1]19,486 18,962
Current portion of non-recourse debt from related parties[1]2,341 2,200
Total current liabilities276,194 279,666
Derivative liabilities, net of current portion[1]11,166 10,128
Deferred revenue and customer deposits, net of current portion[1]201,863 241,794
Long-term portion of recourse debt357,876 360,339
Long-term portion of non-recourse debt[1]284,541 289,241
Long-term portion of recourse debt from related parties27,734 27,734
Long-term portion of non-recourse debt[1]33,417 34,119
Other long-term liabilities[1]58,032 55,937
Total liabilities1,250,823 1,298,958
Commitments and contingencies (Note 13)
Redeemable noncontrolling interest58,802 57,261
Total stockholders’ deficit(105,439)(91,661)
Noncontrolling interest114,664 125,110
Total liabilities, redeemable noncontrolling interest, stockholders' deficit and noncontrolling interest $ 1,318,850 $ 1,389,668
[1]We have variable interest entities which represent a portion of the consolidated balances are recorded within the "Cash and cash equivalents," "Restricted cash," "Accounts receivable," "Customer financing receivable," "Prepaid expenses and other current assets," "Property and equipment, net," "Customer financing receivable, non-current," "Restricted cash, non-current," "Other long-term assets," "Accounts payable," "Accrued other current liabilities," "Deferred revenue and customer deposits," "Current portion of non-recourse debt from related parties," "Derivative liabilities, net of current portion," "Deferred revenue and customer deposits, net of current portion," "Long-term portion of non-recourse debt," and "Other long-term liabilities" financial statement line items in the Condensed Consolidated Balance Sheets (see Note 12).

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (unaudited) - USD ($) shares in Thousands, $ in Thousands3 Months Ended
Mar. 31, 2019Mar. 31, 2018
Revenue $ 200,707 $ 169,361
Cost of revenue184,952 125,695
Gross profit15,755 43,666
Operating expenses:
Research and development28,859 14,731
Sales and marketing20,463 8,262
General and administrative39,074 14,988
Total operating expenses88,396 37,981
Gain (loss) from operations(72,641)5,685
Interest income1,885 415
Interest expense(15,962)(21,379)
Interest expense to related parties(1,612)(2,627)
Other income (expense), net265 (75)
Loss on revaluation of warrant liabilities and embedded derivatives0 (4,034)
Net loss before income taxes(88,065)(22,015)
Income tax provision208 333
Net loss(88,273)(22,348)
Net loss attributable to noncontrolling interests and redeemable noncontrolling interests(3,832)(4,632)
Net loss attributable to Class A and Class B common stockholders $ (84,441) $ (17,716)
Net loss per share attributable to Class A and Class B common stockholders, basic and diluted (in dollars per share) $ (0.76) $ (1.70)
Weighted average shares used to compute net loss per share attributable to Class A and Class B common stockholders, basic and diluted (in shares)111,842 10,403
Product
Revenue $ 141,734 $ 121,307
Cost of revenue124,000 80,355
Installation
Revenue22,258 14,118
Cost of revenue24,166 10,438
Service
Revenue23,290 19,907
Cost of revenue27,557 24,253
Electricity
Revenue13,425 14,029
Cost of revenue $ 9,229 $ 10,649

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Loss (unaudited) - USD ($) $ in Thousands3 Months Ended
Mar. 31, 2019Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net loss attributable to Class A and Class B stockholders $ (84,441) $ (17,716)
Other comprehensive income (loss), net of taxes:
Unrealized gain (loss) on available-for-sale securities17 (9)
Change in derivative instruments designated and qualifying in cash flow hedges(2,191)
Change in derivative instruments designated and qualifying in cash flow hedges2,867
Other comprehensive income (loss), net of taxes(2,174)2,858
Comprehensive loss(86,615)(14,858)
Comprehensive loss attributable to noncontrolling interests and redeemable noncontrolling interests(2,048)(2,579)
Comprehensive loss attributable to Class A and Class B stockholders $ (88,663) $ (17,437)

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Convertible Redeemable Preferred Stock, Redeemable Noncontrolling Interest, Stockholders' Deficit and Noncontrolling Interest (unaudited) - USD ($) $ in ThousandsTotalStockholders' DeficitCommon StockAdditional Paid-In CapitalAccumulated Other Comprehensive Gain (Loss)Accumulated DeficitRedeemable Noncontrolling InterestNoncontrolling InterestConvertible Redeemable Preferred Stock
Beginning balance (in shares) at Dec. 31, 2017[1]10,353,269
Beginning balance at Dec. 31, 2017 $ (2,180,005) $ 1 [1] $ 150,803 $ (162) $ (2,330,647)
Beginning balance at Dec. 31, 2017 $ 58,154 $ 155,372
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of restricted stock awards (in shares)[1]68,098
Issuance of restricted stock awards120 120
Exercise of stock options (in shares)[1]3,615
Exercise of stock options67 67
Stock-based compensation expense7,614 7,614
Excess fair value of consideration paid over the noncontrolling interest reduction $ (9)(9)(9)
Change in effective and ineffective portion of interest rate swap agreement2,867 288 288 3 2,576
Distributions to noncontrolling interests(1,472)(2,066)
Net income (loss)(22,348)1,491 (6,123)
Net loss attributable to Class A and Class B common stockholders(17,716)(17,716)(17,716)
Ending balance (in shares) at Mar. 31, 2018[1]10,424,982
Ending balance at Mar. 31, 2018(2,189,641) $ 1 [1]158,604 117 (2,348,363)
Ending balance at Mar. 31, 201858,176 149,759
Beginning balance (in shares) at Dec. 31, 201771,740,162
Beginning balance at Dec. 31, 2017 $ 1,465,841
Ending balance (in shares) at Mar. 31, 201871,740,162
Ending balance at Mar. 31, 2018 $ 1,465,841
Beginning balance (in shares) at Dec. 31, 2018109,421,183
Beginning balance at Dec. 31, 2018(91,661)(91,661) $ 11 2,480,597 131 (2,572,400)
Beginning balance at Dec. 31, 201857,261 125,110
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of restricted stock awards (in shares)2,960,462
ESPP purchase (in shares)696,036
ESPP purchase6,916 6,916
Exercise of stock options (in shares)136,382
Exercise of stock options577 577
Stock-based compensation expense63,166 63,166
Excess fair value of consideration paid over the noncontrolling interest reduction17 17 17
Change in effective and ineffective portion of interest rate swap agreement(2,191)(143)(143)(2,048)
Distributions to noncontrolling interests(282)(2,613)
Net income (loss)(88,273)1,823 (5,655)
Net loss attributable to Class A and Class B common stockholders(84,441)(84,441)(84,441)
Ending balance (in shares) at Mar. 31, 2019113,214,063
Ending balance at Mar. 31, 2019 $ (105,439) $ (105,439) $ 11 $ 2,551,256 $ 5 $ (2,656,711)
Ending balance at Mar. 31, 2019 $ 58,802 $ 114,664
Beginning balance (in shares) at Dec. 31, 20180
Beginning balance at Dec. 31, 2018 $ 0
Ending balance (in shares) at Mar. 31, 20190
Ending balance at Mar. 31, 2019 $ 0
[1]Common Stock issued and converted to Class A Common and Class B Common effective July 2018.

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands3 Months Ended
Mar. 31, 2019Mar. 31, 2018
Cash flows from operating activities:
Net income (loss) $ (88,273) $ (22,348)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and Amortization11,271 10,847
Write-off of property, plant and equipment, net1 0
Revaluation of derivative contracts(453)7,157
Stock-based compensation63,882 7,956
Loss on long-term REC purchase contract59 12
Revaluation of stock warrants0 (3,271)
Common stock warrant valuation0 (100)
Amortization of debt issuance cost5,152 7,168
Changes in operating assets and liabilities:
Accounts receivable816 (28,203)
Inventories15,932 (6,818)
Deferred cost of revenue26,014 16,282
Customer financing receivable and other1,339 1,306
Prepaid expenses and other current assets5,194 (446)
Other long-term assets83 1,266
Accounts payable(2,464)(827)
Accrued warranty(2,500)(87)
Accrued other current liabilities823 (10,083)
Deferred revenue and customer deposits(44,533)(22,347)
Other long-term liabilities3,487 8,049
Net cash used in operating activities(4,170)(34,487)
Cash flows from investing activities:
Purchase of property, plant and equipment(8,543)(223)
Payments for acquisition of intangible assets(848)0
Purchase of marketable securities0 (8,991)
Proceeds from maturity of marketable securities104,500 15,750
Net cash provided by investing activities95,109 6,536
Cash flows from financing activities:
Repayment of debt(5,016)(4,489)
Repayment of debt to related parties(778)(290)
Distributions to noncontrolling and redeemable noncontrolling interests(3,189)(3,832)
Proceeds from issuance of common stock7,493 120
Payments of initial public offering issuance costs0 (578)
Net cash used in financing activities(1,490)(9,069)
Net increase (decrease) in cash, cash equivalents, and restricted cash89,449 (37,020)
Beginning of period280,485 180,612
End of period369,934 143,592
Supplemental disclosure of cash flow information:
Cash paid during the period for interest14,545 11,216
Cash paid during the period for taxes222 401
Non-cash investing and financing activities:
Liabilities recorded for property, plant and equipment2,067 65
Liabilities recorded for intangible assets0 362
Issuance of restricted stock0 242
Accrued distributions to Equity Investors282 282
Accrued interest and issuance for notes439 7,808
Accrued interest and issuance for notes to related parties $ 0 $ 1,165

Nature of Business and Liquidit

Nature of Business and Liquidity3 Months Ended
Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Business and LiquidityNature of Business and Liquidity Nature of Business We design, manufacture, sell and, in certain cases, install solid-oxide fuel cell systems, or Energy Servers, for on-site power generation. Our Energy Servers utilize an innovative fuel cell technology. The Energy Servers provide efficient energy generation with reduced operating costs and lower greenhouse gas emissions. By generating power where it is consumed, our energy producing systems offer increased electrical reliability and improved energy security while providing a path to energy independence. We were originally incorporated in Delaware under the name of Ion America Corporation on January 18, 2001 and were renamed on September 16, 2006 to Bloom Energy Corporation. Throughout this Quarterly Report on Form 10-Q, unless the context otherwise requires, the terms “Bloom Energy,” “we,” “us” and “our” refer to Bloom Energy Corporation and its consolidated subsidiaries. Liquidity We have incurred operating losses and negative cash flows from operations since our inception. Our ability to achieve our long-term business objectives is dependent upon, among other things, raising additional capital, acceptance of our products and attaining future profitability. We believe we will be successful in raising additional financing from our stockholders or from other sources, in expanding operations and in gaining market share. For example, in July 2018, we successfully completed an initial public stock offering ("IPO") with the sale of 20,700,000 shares of Class A common stock at a price of $15.00 per share, resulting in net cash proceeds of $282.3 million net of underwriting discounts, commissions and offering costs. We believe that our existing cash and cash equivalents and short-term investments will be sufficient to meet our operating and capital cash flow requirements and other cash flow needs for at least the next 12 months from the date of this quarterly report on Form 10-Q. However, there can be no assurance that in the event we require additional financing, such financing will be available on terms which are favorable or at all.

Basis of Presentation and Signi

Basis of Presentation and Significant Accounting Policies3 Months Ended
Mar. 31, 2019
Accounting Policies [Abstract]
Basis of Presentation and Summary of Significant Accounting PoliciesBasis of Presentation and Summary of Significant Accounting Policies We have prepared the condensed consolidated financial statements included herein pursuant to the rules and regulations of the U.S. Securities and Exchange Commission ("SEC"). Certain information and footnote disclosures normally included in the consolidated balance sheets as of March 31, 2019 and December 31, 2018 , the consolidated statements of operations, the consolidated statements of comprehensive loss, the consolidated statements of convertible redeemable preferred stock, redeemable noncontrolling interest, stockholders' deficit and noncontrolling interest, and the consolidated statements of cash flows for the three months ended March 31, 2019 and 2018 , as well as other information disclosed in the accompanying notes have been prepared in accordance with U.S. generally accepted accounting principles as applied in the United States ("U.S. GAAP") have been condensed or omitted pursuant to such rules and regulations. However, we believe that the disclosures herein are adequate to ensure the information presented is not misleading. These unaudited condensed consolidated financial statements should be read in conjunction with the audited financial statements and the notes thereto included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2018 . We believe that all necessary adjustments, which consisted only of normal recurring items, have been included in the accompanying financial statements to fairly state the results of the interim periods. The results of operations for the interim periods presented are not necessarily indicative of the operating results to be expected for any subsequent interim period or for our fiscal year ending December 31, 2019. Principles of Consolidation These condensed consolidated financial statements reflect our accounts and operations and those of our subsidiaries in which we have a controlling financial interest. We use a qualitative approach in assessing the consolidation requirement for each of our variable interest entities, which we refer to as our power purchase agreement entities ("PPA Entities"). This approach focuses on determining whether we have the power to direct those activities of the PPA Entities that most significantly affect their economic performance and whether we have the obligation to absorb losses, or the right to receive benefits, that could potentially be significant to the PPA Entities. For all periods presented, we have determined that we are the primary beneficiary in all of its operational PPA Entities. We evaluate our relationships with the PPA Entities on an ongoing basis to ensure that we continues to be the primary beneficiary. All intercompany transactions and balances have been eliminated in consolidation. For additional information, see Note 12 - Power Purchase Agreement Programs . Use of Estimates The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires us to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and the accompanying notes. Significant estimates include assumptions used to compute the best estimate of selling-prices, the fair value of lease and non-lease components such as estimated output, efficiency and residual value of the Energy Servers, estimates for inventory write-downs, estimates for future cash flows and the economic useful lives of property, plant and equipment, the valuation of other long-term assets, the valuation of certain accrued liabilities such as derivative valuations, estimates for accrued warranty and extended maintenance, estimates for recapture of U.S. Treasury grants and similar grants, estimates for income taxes and deferred tax asset valuation allowances, warrant liabilities, stock-based compensation costs and estimates for the allocation of profit and losses to the noncontrolling interests. Actual results could differ materially from these estimates under different assumptions and conditions. Concentration of Risk Geographic Risk - The majority of our revenue and long-lived assets are attributable to operations in the United States for all periods presented. Additionally, we sell our Energy Servers in Japan, China, India, and the Republic of Korea, collectively our Asia Pacific region. In the three months ended March 31, 2019 and 2018, total revenue in the Asia Pacific region was 24.0% and 17.3% , respectively, of our total revenue. Credit Risk - At March 31, 2019 , customer A and customer B accounted for 58.0% and 12.1% , respectively, of accounts receivable. At December 31, 2018 , customer A accounted for 66.8% of accounts receivable. At March 31, 2019 and December 31, 2018 , we did not maintain any allowances for doubtful accounts as we deemed all of our receivables fully collectible. To date, we have neither provided an allowance for uncollectible accounts nor experienced any credit loss. Customer Risk - In the three months ended March 31, 2019 , revenue from customer A, customer B and customer C represented 24% , 25% ,and 23% , respectively, of our total revenue. Customer A wholly owns a Third-Party PPA which purchases Energy Servers from us, however, such purchases and resulting revenue are made on behalf of various customers of this Third-Party PPA. In the three months ended March 31, 2018 , revenue from customer B and customer D represented 53% and 17% , respectively, of our total revenue. Fair Value Measurement Financial Accounting Standards Board ("FASB") Accounting Standards Codification Topic 820 - Fair Value Measurements and Disclosures ("ASC 820"), defines fair value, establishes a framework for measuring fair value under U.S. GAAP and enhances disclosures about fair value measurements. Fair value is defined under ASC 820 as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value under ASC 820 must maximize the use of observable inputs and minimize the use of unobservable inputs. The guidance describes a fair value hierarchy based on three levels of inputs, of which the first two are considered observable and the last unobservable, that may be used to measure fair value: Level 1 Quoted prices in active markets for identical assets or liabilities. Financial assets utilizing Level 1 inputs typically include money market securities and U.S. Treasury securities. Level 2 Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Financial instruments utilizing Level 2 inputs include interest rate swaps. Level 3 Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Financial liabilities utilizing Level 3 inputs include natural gas fixed price forward contract derivatives. Derivative liability valuations are performed based on a binomial lattice model and adjusted for illiquidity and/or nontransferability and such adjustments are generally based on available market evidence. Recent Accounting Pronouncements Accounting Guidance Implemented in Fiscal Year 2019 Other than the adoption of accounting guidances mentioned below, there have been no other significant changes in our reported financial position or results of operations and cash flows resulting from the adoption of new accounting pronouncements. There have been no changes to our significant accounting policies that were disclosed in our Annual Report on Form 10-K for the fiscal year ended December 31, 2018 that have had a significant impact on our condensed consolidated financial statements or notes thereto as of and for the three months ended March 31, 2019. Hedging Activities - During the first three months of fiscal 2019, we adopted Accounting Standards Update ("ASU") 2017-12 Derivatives and Hedging (Topic 815), Targeted Improvements to Accounting for Hedging Activities ("ASU 2017-12") to help entities recognize the economic results of their hedging strategies in the financial statements so that stakeholders can better interpret and understand the effect of hedge accounting on reported results. It is intended to more clearly disclose an entity’s risk exposures and how we manage those exposures through hedging, and it is expected to simplify the application of hedge accounting guidance. The new guidance is effective for annual periods beginning after December 15, 2018, with early adoption permitted. We adopted this standard on January 1, 2019. There was not a material impact to our condensed consolidated financial statements upon adoption. Income Taxes - During the first three months of fiscal 2019, we adopted ASU 2016-16, Income Taxes—Intra-Entity Transfers of Assets Other Than Inventory (Topic 740) , which requires that entities recognize the income tax consequences of an intra-entity transfer of an asset, other than inventory, when the transfer occurs. The standard is effective for us in our Annual Report on Form 10-K for the fiscal year ended December 31, 2019 and is required to be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the adoption period. Adoption of this standard had no impact on our consolidated financial statements. Income Taxes - During the first three months of fiscal 2019, we adopted ASU 2018-02 Income Statement—Reporting Comprehensive Income (Topic 220) Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income ("ASU 2018-02"), which permits reclassification of certain tax effects in Other Comprehensive Income ("OCI") caused by the U.S. tax reform enacted in December 2017 to retained earnings. We do not have any tax effect (due to full valuation allowance) in our OCI account, thus this guidance has no impact on us. New Accounting Guidance to be Implemented Revenue Recognition - In May 2014, the FASB issued ASU 2014-14, Revenue From Contracts With Customers, as amended ("ASU 2014-14" ) . The guidance provides principles for recognizing revenue for the transfer of promised goods or services to customers with the consideration to which the entity expects to be entitled in exchange for those goods or services, as well as guidance on the recognition of costs related to obtaining and fulfilling customer contracts. The guidance also requires expanded disclosures about the nature, amount, timing, and uncertainty of revenues and cash flows arising from customer contracts, including significant judgments and changes in judgments. ASU 2014-14 is effective for our annual period beginning January 1, 2019, and for our interim periods beginning on January 1, 2020. ASU 2014-14 can be adopted using either of two methods: (i) retrospective to each prior reporting period presented with the option to elect certain practical expedients as defined within the guidance (“full retrospective method”); or (ii) retrospective with the cumulative effect of initially applying the guidance recognized at the date of initial application and providing certain additional disclosures as defined per the guidance (“modified retrospective method”). We will adopt ASU 2014-14 for our fiscal year ended December 31, 2019 using the modified retrospective method, resulting in a cumulative-effect adjustment to retained earnings on January 1, 2019. We are currently evaluating whether ASU 2014-14 will have a material impact on our consolidated financial statements and expect its adoption to have an impact related to the costs of obtaining our contracts, customer deposits, and deferred revenue. Further, in preparation for ASU 2014-14, we are in the process of updating our accounting policies, processes, internal controls over financial reporting, and system requirements. Leases - In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) , as amended, which provides new authoritative guidance on lease accounting. Among its provisions, the standard requires lessees to recognize right-of-use assets and lease liabilities on the balance sheet for operating leases and also requires additional qualitative and quantitative disclosures about lease arrangements. In March 2019 the FASB issued further guidance in ASU 2019-01, Leases (Topic 842) , which provides clarifications to certain lessor transactions and other reporting matters. This guidance will be effective for us beginning January 1, 2020, and requires the modified retrospective method of adoption. Early adoption is permitted. We expect to adopt this guidance on January 1, 2020 and expect to recognize right of use assets and lease liabilities for contracts currently recognized as operating leases where we are the lessee. Cloud Computing - In August 2018, the FASB issued ASU 2018-15, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40) Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract ("ASU 2018-15") , to clarify the guidance on the costs of implementing a cloud computing hosting arrangement that is a service contract. Under ASU 2018-15, the entity is required to follow the guidance in Subtopic 350-40, Internal-Use Software , to determine which implementation costs under the service contract to be capitalized as an asset and which costs to expense. ASU 2018-15 is effective for us for the annual periods beginning in 2021 and the interim periods in 2022 on a retrospective or prospective basis and early adoption is permitted. We are currently evaluating the timing of adoption and impact of ASU 2018-15 on our consolidated financial statements and related disclosures.

Financial Instruments

Financial Instruments3 Months Ended
Mar. 31, 2019
Cash and Cash Equivalents [Abstract]
Financial InstrumentsFinancial Instruments Cash, Cash Equivalents and Restricted Cash The carrying value of cash and cash equivalents approximate fair value and are as follows (in thousands): March 31, December 31, 2019 2018 As held: Cash $ 152,676 $ 136,642 Money market funds 217,258 143,843 $ 369,934 $ 280,485 As reported: Cash and cash equivalents $ 320,414 $ 220,728 Restricted cash 49,520 59,757 $ 369,934 $ 280,485 Restricted cash consisted of the following (in thousands): March 31, December 31, 2019 2018 Current Restricted cash $ 13,379 $ 25,740 Restricted cash related to PPA Entities 5,040 2,917 Restricted cash, current 18,419 28,657 Non-current Restricted cash 3,250 3,246 Restricted cash related to PPA Entities 27,851 27,854 Restricted cash, non-current 31,101 31,100 $ 49,520 $ 59,757 Short-Term Investments As of March 31, 2019 and December 31, 2018 , we had no short-term investments and $104.4 million in U.S. Treasury Bills , respectively. Derivative Instruments We have derivative financial instruments related to natural gas forward contracts and interest rate swaps. See Note 7 - Derivative Financial Instruments for a full description of our derivative financial instruments.

Fair Value

Fair Value3 Months Ended
Mar. 31, 2019
Fair Value Disclosures [Abstract]
Fair ValueFair Value Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis The tables below sets forth, by level, our financial assets that were accounted for at fair value for the respective periods. The table does not include assets and liabilities that are measured at historical cost or any basis other than fair value (in thousands): Fair Value Measured at Reporting Date Using March 31, 2019 Level 1 Level 2 Level 3 Total Assets Cash equivalents: Money market funds $ 217,258 $ — $ — $ 217,258 Interest rate swap agreements — 27 — 27 $ 217,258 $ 27 $ — $ 217,285 Liabilities Accrued other current liabilities $ 1,723 $ — $ — $ 1,723 Derivatives: Natural gas fixed price forward contracts — — 8,796 8,796 Interest rate swap agreements 1 — 5,719 — 5,719 $ 1,723 $ 5,719 $ 8,796 $ 16,238 1 As of March 31, 2019 , $0.1 million of the gain on the interest rate swaps accumulated in other comprehensive income (loss) is expected to be reclassified into earnings in the next twelve months. Fair Value Measured at Reporting Date Using December 31, 2018 Level 1 Level 2 Level 3 Total Assets Cash equivalents: Money market funds $ 143,843 $ — $ — $ 143,843 Short-term investments 104,350 — — 104,350 Interest rate swap agreements — 82 — 82 $ 248,193 $ 82 $ — $ 248,275 Liabilities Accrued other current liabilities $ 1,331 $ — $ — $ 1,331 Derivatives: Natural gas fixed price forward contracts — — 9,729 9,729 Interest rate swap agreements — 3,630 — 3,630 $ 1,331 $ 3,630 $ 9,729 $ 14,690 The following table provides the fair value of our natural gas fixed price contracts (dollars in thousands): March 31, December 31, 2019 2018 Number of Contracts (MMBTU)² Fair Value Number of Fair Value Liabilities ¹ Natural gas fixed price forward contracts (not under hedging relationships) 2,873 $ 8,796 3,096 $ 9,729 ¹ Recorded in current liabilities and derivative liabilities in the condensed consolidated balance sheets. ² One MMBTU, or one million British Thermal Units, is a traditional unit of energy used to describe the heat value (energy content) of fuels. For the three months ended March 31, 2019 and 2018 , we marked-to-market the fair value of its fixed price natural gas forward contracts and recorded a gain of $0.4 million and a loss of $0.9 million , respectively, and recorded gains on the settlement of these contracts of $0.5 million and $1.1 million , respectively, in cost of revenue on the condensed consolidated statement of operations. Embedded Derivative on 6% Convertible Promissory Notes - Between December 2015 and September 2016, we issued $260.0 million convertible promissory notes due December 2020 ("6% Notes") to certain investors. The 6% Notes bore a 5% fixed interest rate, payable monthly either in cash or in kind, at our election. We amended the terms of the 6% Notes in June 2017 to reduce the collateral securing the notes and to increase the interest rate from 5% to 6% . The 6% Notes are convertible at the option of the holders at a conversion price of $11.25 per share. Upon the IPO, the final value of the conversion feature was $177.2 million and was reclassified from a derivative liability to additional paid-in capital. There were no transfers between fair value measurement classifications during the periods ended March 31, 2019 and 2018 . The changes in the Level 3 financial assets were as follows (in thousands): Natural Gas Fixed Price Forward Contracts Preferred Stock Warrants Embedded Derivative Liability Total Balances at December 31, 2018 $ 9,729 $ — $ — $ 9,729 Settlement of natural gas fixed price forward contracts (527 ) — — (527 ) Changes in fair value (406 ) — — (406 ) Balances at March 31, 2019 $ 8,796 $ — $ — $ 8,796 Natural Preferred Embedded Total Balances at December 31, 2017 $ 15,368 $ 9,825 $ 140,771 $ 165,964 Settlement of natural gas fixed price forward contracts (1,102 ) — — (1,102 ) Changes in fair value 855 (3,271 ) 9,732 7,316 Balances at March 31, 2018 $ 15,121 $ 6,554 $ 150,503 $ 172,178 Significant changes in any assumption input in isolation can result in a significant change in fair value measurement. Generally, an increase in the market price of our shares of common stock, an increase in natural gas prices, an increase in the volatility of ours shares of common stock and an increase in the remaining term of the conversion feature would each result in a directionally similar change in the estimated fair value of our derivative liability. Increases in such assumption values would increase the associated liability while decreases in these assumption values would decrease the associated liability. An increase in the risk-free interest rate or a decrease in the market price of our shares of common stock would result in a decrease in the estimated fair value measurement and thus a decrease in the associated liability. Financial Assets and Liabilities Not Measured at Fair Value on a Recurring Basis Customer Receivables and Debt Instruments - We estimate fair value for customer financing receivables, senior secured notes, term loans and convertible promissory notes based on rates currently offered for instruments with similar maturities and terms (Level 3). The following table presents the estimated fair values and carrying values of customer receivables and debt instruments (in thousands): March 31, 2019 December 31, 2018 Net Carrying Value Fair Value Net Carrying Value Fair Value Customer receivables: Customer financing receivables $ 71,337 $ 51,312 $ 72,676 $ 51,541 Debt instruments: Recourse LIBOR + 4% term loan due November 2020 2,795 2,914 3,214 3,311 5% convertible promissory note due December 2020 35,136 33,832 34,706 31,546 6% convertible promissory notes due December 2020 267,289 418,999 263,284 353,368 10% notes due July 2024 96,073 99,598 95,555 99,260 Non-recourse 5.22% senior secured notes due March 2025 75,786 79,341 78,566 80,838 7.5% term loan due September 2028 35,758 41,759 36,319 39,892 LIBOR + 5.25% term loan due October 2020 23,734 25,679 23,916 25,441 6.07% senior secured notes due March 2030 81,806 88,715 82,337 85,917 LIBOR + 2.5% term loan due December 2021 122,701 125,770 123,384 123,040 Long-Lived Assets - Our long-lived assets include property, plant and equipment. The carrying amounts of our long-lived assets are periodically reviewed for impairment whenever events or changes in circumstances indicate that the carrying value of these assets may not be recoverable or that the useful life is shorter than originally estimated. No material impairment of any long-lived assets was identified in the three months ended March 31, 2019 and 2018 .

Balance Sheet Components

Balance Sheet Components3 Months Ended
Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Balance Sheet ComponentsBalance Sheet Components Inventories The components of inventory consisted of the following (in thousands): March 31, December 31, 2019 2018 Raw materials $ 42,965 $ 53,273 Work-in-progress 23,672 22,303 Finished goods 49,907 56,900 $ 116,544 $ 132,476 Prepaid Expense and Other Current Assets Prepaid expenses and other current assets consisted of the following (in thousands): March 31, December 31, 2019 2018 Government incentives receivable $ 960 $ 1,001 Prepaid expenses and other current assets 27,402 32,741 $ 28,362 $ 33,742 Property, Plant and Equipment, Net Property, plant and equipment, net consisted of the following (in thousands): March 31, December 31, 2019 2018 Energy Servers $ 511,485 $ 511,485 Computers, software and hardware 18,796 16,536 Machinery and equipment 100,311 99,209 Furniture and fixtures 8,669 4,337 Leasehold improvements 34,126 18,629 Building 40,512 40,512 Construction in progress 10,496 29,084 724,395 719,792 Less: Accumulated depreciation (249,010 ) (238,378 ) $ 475,385 $ 481,414 Our construction in progress decreased $18.6 million, as compared to December 31, 2018, primarily due to our investment in leasehold improvements and furniture and fixtures related to our move to our new corporate headquarters. Our property, plant and equipment under operating leases by the PPA Entities was $397.5 million and $397.5 million as of March 31, 2019 and December 31, 2018 , respectively. The accumulated depreciation for these assets was $83.8 million and $77.4 million as of March 31, 2019 and December 31, 2018 , respectively. Depreciation expense related to our property, plant and equipment was $6.4 million and $6.4 million for the three months ended March 31, 2019 and 2018 , respectively. Customer Financing Leases, Receivable The components of investment in sales-type financing leases consisted of the following (in thousands): March 31, December 31, 2019 2018 Total minimum lease payments to be received $ 98,632 $ 100,816 Less: Amounts representing estimated executing costs (24,522 ) (25,180 ) Net present value of minimum lease payments to be received 74,110 75,636 Estimated residual value of leased assets 1,051 1,051 Less: Unearned income (3,824 ) (4,011 ) Net investment in sales-type financing leases 71,337 72,676 Less: Current portion (5,717 ) (5,594 ) Non-current portion of investment in sales-type financing leases $ 65,620 $ 67,082 The future scheduled customer payments from sales-type financing leases were as follows as of March 31, 2019 (in thousands): Remainder of 2019 2020 2021 2022 2023 Thereafter Future minimum lease payments, less interest $ 4,256 $ 6,022 $ 6,415 $ 6,853 $ 7,310 $ 39,430 Other Long-Term Assets Other long-term assets consisted of the following (in thousands): March 31, December 31, 2019 2018 Prepaid and other long-term assets $ 26,321 $ 27,086 Equity-method investments 6,292 6,046 Long-term deposits 1,773 1,660 $ 34,386 $ 34,792 Equity-method investments In May 2013, we entered into a joint venture with Softbank Corp., and established Bloom Energy Japan limited which is accounted for as an equity method investment. Under this arrangement, we sell Energy Servers and provide maintenance services to the joint venture. Accounts receivable from this joint venture was $2.7 million and $2.4 million as of March 31, 2019 and December 31, 2018 , respectively. Accrued Warranty Accrued warranty liabilities consisted of the following (in thousands): March 31, December 31, 2019 2018 Product warranty $ 9,183 $ 10,935 Operations and maintenance services agreements 7,553 8,301 $ 16,736 $ 19,236 Changes during the current period in the standard product warranty liability were as follows (in thousands): Balances at December 31, 2018 $ 10,935 Accrued warranty, net 629 Warranty expenditures during period (2,381 ) Balances at March 31, 2019 $ 9,183 Accrued Other Current Liabilities Accrued other current liabilities consisted of the following (in thousands): March 31, December 31, 2019 2018 Compensation and benefits $ 18,327 $ 16,742 Current portion of derivative liabilities 3,349 3,232 Managed services liabilities 4,633 5,091 Accrued installation 6,408 6,859 Sales tax liabilities 2,202 1,700 Interest payable 3,631 4,675 Other 29,416 31,236 $ 67,966 $ 69,535 Other Long-Term Liabilities Accrued other long-term liabilities consisted of the following (in thousands): March 31, December 31, 2019 2018 Delaware grant $ 10,469 $ 10,469 Managed services liabilities 29,062 29,741 Other 18,501 15,727 $ 58,032 $ 55,937 We have entered into managed services agreements that provide for the payment of property taxes and insurance premiums on behalf of customers. These obligations are included in each agreements' contract value and are recorded as short-term or long-term liabilities based on the estimated payment dates. The long-term managed services liabilities accrued were $29.1 million and $29.7 million as of March 31, 2019 and December 31, 2018 , respectively.

Outstanding Loans and Security

Outstanding Loans and Security Agreements3 Months Ended
Mar. 31, 2019
Debt Disclosure [Abstract]
Outstanding Loans and Security AgreementsOutstanding Loans and Security Agreements The following is a summary of our debt as of March 31, 2019 (in thousands): Unpaid Net Carrying Value Unused Current Long- Total LIBOR + 4% term loan due November 2020 $ 2,857 $ 1,683 $ 1,112 $ 2,795 $ — 5% convertible promissory note due December 2020 33,104 — 35,136 35,136 — 6% convertible promissory notes due December 2020 296,233 — 267,289 267,289 — 10% notes due July 2024 100,000 14,000 82,073 96,073 — Total recourse debt 432,194 15,683 385,610 401,293 — 5.22% senior secured term notes due March 2025 76,827 12,151 63,635 75,786 — 7.5% term loan due September 2028 39,759 2,341 33,417 35,758 — LIBOR + 5.25% term loan due October 2020 24,438 926 22,808 23,734 — 6.07% senior secured notes due March 2030 82,889 2,634 79,172 81,806 — LIBOR + 2.5% term loan due December 2021 124,593 3,775 118,926 122,701 — Letters of Credit due December 2021 — — — — 1,220 Total non-recourse debt 348,506 21,827 317,958 339,785 1,220 Total debt $ 780,700 $ 37,510 $ 703,568 $ 741,078 $ 1,220 The following is a summary of our debt as of December 31, 2018 (in thousands): Unpaid Principal Balance Net Carrying Value Unused Borrowing Capacity Current Long- Term Total LIBOR + 4% term loan due November 2020 $ 3,286 $ 1,686 $ 1,528 $ 3,214 $ — 5% convertible promissory notes due December 2020 33,104 — 34,706 34,706 — 6% convertible promissory notes due December 2020 296,233 — 263,284 263,284 — 10% notes due July 2024 100,000 7,000 88,555 95,555 — Total recourse debt 432,623 8,686 388,073 396,759 — 5.22% senior secured term notes due March 2025 79,698 11,994 66,572 78,566 — 7.5% term loan due September 2028 40,538 2,200 34,119 36,319 — LIBOR + 5.25% term loan due October 2020 24,723 827 23,089 23,916 — 6.07% senior secured notes due March 2030 83,457 2,469 79,868 82,337 — LIBOR + 2.5% term loan due December 2021 125,456 3,672 119,712 123,384 — Letters of Credit due December 2021 — — — — 1,220 Total non-recourse debt 353,872 21,162 323,360 344,522 1,220 Total debt $ 786,495 $ 29,848 $ 711,433 $ 741,281 $ 1,220 Recourse debt refers to debt that Bloom Energy Corporation has an obligation to pay. Non-recourse debt refers to debt that is recourse to only specified assets or our subsidiaries. The differences between the unpaid principal balances and the net carrying values apply to debt discounts and deferred financing costs. We were in compliance with all financial covenants as of March 31, 2019 and December 31, 2018 . Recourse Debt Facilities LIBOR + 4% Term Loan due November 2020 - In May 2013, we entered into a $5.0 million credit agreement and a $12.0 million financing agreement to help fund the building of a new facility in Newark, Delaware. The $5.0 million credit agreement expired in December 2016. The $12.0 million financing agreement has a term of 90 months, payable monthly at a variable rate equal to one-month LIBOR plus the applicable margin. The weighted average interest rate as of March 31, 2019 and December 31, 2018 was 6.5% and 5.9% , respectively. The loan requires monthly payments and is secured by the manufacturing facility. In addition, the credit agreements also include a cross-default provision which provides that the remaining balance of borrowings under the agreements will be due and payable immediately if a lien is placed on the Newark facility in the event we default on any indebtedness in excess of $100,000 individually or $300,000 in the aggregate. Under the terms of these credit agreements, we are required to comply with various restrictive covenants. As of March 31, 2019 and December 31, 2018 , the debt outstanding was $2.9 million and $3.3 million , respectively. 5% Convertible Promissory Notes due 2020 (Originally 8% Convertible Promissory Notes due December 2018) - Between December 2014 and June 2016, we issued $193.2 million of three -year convertible promissory notes ("8% Notes") to certain investors. The 8% Notes had a fixed interest rate of 8% compounded monthly, due at maturity or at the election of the investor with accrued interest due in December of each year. On January 18, 2018, amendments were finalized to extend the maturity dates for all the 8% Notes to December 2019. At the same time, the portion of the notes that was held by Constellation NewEnergy, Inc. (Constellation) was extended to December 2020 and the interest rate decreased from 8% to 5% ("5% Notes"). Investors held the right to convert the unpaid principal and accrued interest of both the 8% and 5% notes to Series G convertible preferred stock at any time at the price of $38.64 . In July 2018, upon the Company’s IPO, the $221.6 million of principal and accrued interest of outstanding 8% Notes automatically converted into additional paid-in capital, the conversion of which included all the related-party noteholders. The 8% Notes converted to shares of Series G convertible preferred stock and, concurrently, each such share of Series G convertible preferred stock converted automatically into one share of Class B common stock. Upon the IPO, conversions of 5,734,440 shares of Class B common stock were issued and the 8% Notes were retired. Constellation, the holder of the 5% Notes, had not elected to convert as of March 31, 2019 . The outstanding unpaid principal and accrued interest debt balance of the 5% Notes of $35.1 million was classified as non-current as of March 31, 2019 , and the outstanding unpaid principal and accrued interest debt balances of the 5% Notes of $34.7 million as of December 31, 2018 . 6% Convertible Promissory Notes due December 2020 - Between December 2015 and September 2016, we issued $260.0 million convertible promissory notes due December 2020 ("6% Notes") to certain investors. The 6% Notes bore a 5% fixed interest rate, payable monthly either in cash or in kind, at our election. We amended the terms of the 6% Notes in June 2017 to reduce the collateral securing the notes and to increase the interest rate from 5% to 6% . As of March 31, 2019 and 2018 , the amount outstanding on the 6% Notes, which includes interest paid in kind through the IPO date, was $296.2 million and $290.4 million , respectively. Upon the IPO, the debt was convertible at the option of the holders at the conversion price of $11.25 per share into common stock at any time through the maturity date. In January 2018, we amended the terms of the 6% Notes to extend the convertible put option, which investors could elect only if the IPO did not occur prior to December 2019. After the IPO, we paid the interest in cash when due and no additional interest accrued on the consolidated balance sheet on the 6% Notes. On or after July 27, 2020, we may redeem, at our option, all or part of the 6% Notes if the last reported sale price of our common stock has been at least $22.50 for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending within the three trading days immediately preceding the date on which we provide written notice of redemption. In certain circumstances, the 6% Notes are also redeemable at our option in connection with a change of control. Under the terms of the indenture governing the 6% Notes, we are required to comply with various restrictive covenants, including meeting reporting requirements, such as the preparation and delivery of audited consolidated financial statements, and restrictions on investments. In addition, we are required to maintain collateral which secures the 6% Notes in an amount equal to 200% of the principal amount of and accrued and unpaid interest on the outstanding notes. This minimum collateral test is not a negative covenant and does not result in a default if not met. However, the minimum collateral test does restrict us with respect to investing in non-PPA subsidiaries. If we do not meet the minimum collateral test, we cannot invest cash into any non-PPA subsidiary that is not a guarantor of the notes. The 6% Notes also include a cross-acceleration provision which provides that the holders of at least 25% of the outstanding principal amount of the 6% Notes may cause such notes to become immediately due and payable if we or any of our subsidiaries default on any indebtedness in excess of $15.0 million such that the repayment of such indebtedness is accelerated. In connection with the issuance of the 6% Notes, we agreed to issue to J.P. Morgan and CPPIB, upon the occurrence of certain conditions, warrants to purchase our common stock up to a maximum of 146,666 shares and 166,222 shares, respectively. On August 31, 2017, J.P. Morgan transferred its rights to CPPIB. Upon completion of the IPO, the 312,888 warrants were net exercised for 312,575 shares of Class B Common stock. 10% Notes due July 2024 - In June 2017, we issued $100.0 million of senior secured notes ("10% Notes"). The 10% Notes mature between 2019 and 2024 and bear a 10% fixed rate of interest, payable semi-annually. The 10% Notes have a continuing security interest in the cash flows payable to us as servicing, operations and maintenance fees and administrative fees from the five active power purchase agreements in our Bloom Electrons program. Under the terms of the indenture governing the notes, we are required to comply with various restrictive covenants including, among other things, to maintain certain financial ratios such as debt service coverage ratios, to incur additional debt, issue guarantees, incur liens, make loans or investments, make asset dispositions, issue or sell share capital of our subsidiaries and pay dividends, meet reporting requirements, including the preparation and delivery of audited consolidated financial statements, or maintain certain restrictions on investments and requirements in incurring new debt. In addition, we are required to maintain collateral which secures the 10% Notes based on debt ratio analyses. This minimum collateral test is not a negative covenant and does not result in a default if not met. However, the minimum collateral test does restrict us with respect to investing in non-PPA subsidiaries. If we do not meet the minimum collateral test, we cannot invest cash into any non-PPA subsidiary that is not a guarantor of the notes. Non-recourse Debt Facilities 5.22% Senior Secured Term Notes - In March 2013, PPA Company II refinanced its existing debt by issuing 5.22% Senior Secured Notes due March 30, 2025. The total amount of the loan proceeds was $144.8 million , including $28.8 million to repay outstanding principal of existing debt, $21.7 million for debt service reserves and transaction costs and $94.3 million to fund the remaining system purchases. The loan is a fixed rate term loan that bears an annual interest rate of 5.22% payable quarterly. The loan has a fixed amortization schedule of the principal, payable quarterly, which began March 30, 2014 that requires repayment in full by March 30, 2025. The Note Purchase Agreement requires the Company to maintain a debt service reserve, the balance of which was $11.2 million and $11.2 million as of March 31, 2019 and December 31, 2018 , respectively, and which was included as part of long-term restricted cash in the condensed consolidated balance sheets. The notes are secured by all the assets of PPA II. 7.5% Term Loan due September 2028 - In December 2012 and later amended in August 2013, PPA IIIa entered into a $46.8 million credit agreement to help fund the purchase and installation of Energy Servers. The loan bears a fixed interest rate of 7.5% payable quarterly. The loan requires quarterly principal payments which began in March 2014. The credit agreement requires us to maintain a debt service reserve for all funded systems, the balance of which was $3.7 million and $3.7 million as of March 31, 2019 and December 31, 2018 , respectively, and which was included as part of long-term restricted cash in the condensed consolidated balance sheets. The loan is secured by all assets of PPA IIIa. LIBOR + 5.25% Term Loan due October 2020 - In September 2013, PPA IIIb entered into a credit agreement to help fund the purchase and installation of Energy Servers. In accordance with that agreement, PPA IIIb issued floating rate debt based on LIBOR plus a margin of 5.2% , paid quarterly. The aggregate amount of the debt facility is $32.5 million . The loan is secured by all assets of PPA IIIb and requires quarterly principal payments which began in July 2014. The credit agreement requires us to maintain a debt service reserve for all funded systems, the balance of which was $1.7 million and $1.7 million March 31, 2019 and December 31, 2018 , respectively, and which was included as part of long-term restricted cash in the condensed consolidated balance sheets. In September 2013, PPA IIIb entered into pay-fixed, receive-float interest rate swap agreement to convert the floating-rate loan into a fixed-rate loan. 6.07% Senior Secured Notes due March 2025 - In July 2014, PPA IV issued senior secured notes amounting to $99.0 million to third parties to help fund the purchase and installation of Energy Servers. The notes bear a fixed interest rate of 6.07% payable quarterly which began in December 2015 and ends in March 2030. The notes are secured by all the assets of the PPA IV. The Note Purchase Agreement requires us to maintain a debt service reserve, the balance of which was $7.6 million as of March 31, 2019 and $7.5 million as of December 31, 2018 , and which was included as part of long-term restricted cash in the condensed consolidated balance sheets. LIBOR + 2.5% Term Loan due December 2021 - In June 2015, PPA V entered into a $131.2 million credit agreement to fund the purchase and installation of Energy Servers. The lenders are a group of five financial institutions and the terms included commitments to a letter of credit facility (see below). The loan was initially advanced as a construction loan during the development of the PPA V Project and converted into a term loan on February 28, 2017 (the “Term Conversion Date”). As part of the term loan’s conversion, the LC facility commitments were adjusted. In accordance with the credit agreement, PPA V was issued a floating rate debt based on LIBOR plus a margin, paid quarterly. The applicable margins used for calculating interest expense are 2.25% for years 1-3 following the Term Conversion Date and 2.5% thereafter. For the Lenders’ commitments to the loan and the commitments to the LC loan, the PPA V also pays commitment fees at 0.50% per annum over the outstanding commitments, paid quarterly. The loan is secured by all the assets of the PPA V and requires quarterly principal payments which began in March 2017. In connection with the floating-rate credit agreement, in July 2015 the PPA V entered into pay-fixed, receive-float interest rate swap agreements to convert its floating-rate loan into a fixed-rate loan. Letters of Credit due December 2021 - In connection with the June 2015 PPA V credit agreement, the agreement also included commitments to a letter of credit facility with the aggregate principal amount of $6.4 million , later adjusted down to $6.2 million . The amount reserved under the letter of credit as of March 31, 2019 and December 31, 2018 was $5.0 million and $5.0 million , respectively. The unused letter of credit borrowing capacity was $1.2 million as of March 31, 2019 and December 31, 2018. Debt Repayment Schedule and Interest Expense The following table presents our total outstanding debt's unpaid principal balance repayment schedule as of March 31, 2019 (in thousands): Remainder of 2019 $ 24,082 2020 391,442 2021 153,639 2022 40,059 2023 44,209 Thereafter 127,269 $ 780,700 Interest expense of $17.6 million and $24.0 million for the three months ended March 31, 2019 and 2018 , respectively, was recorded in interest expense on the condensed consolidated statements of operations. Related Party Debt Portions of the above described recourse and non-recourse debt is held by various related parties. See Note 15 - Related Party Transactions for a full description.

Derivative Financial Instrument

Derivative Financial Instruments3 Months Ended
Mar. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial InstrumentsDerivative Financial Instruments Interest Rate Swaps We use various financial instruments to minimize the impact of variable market conditions on its results of operations. We use interest rate swaps to minimize the impact of fluctuations of interest rate changes on its outstanding debt where LIBOR is applied. We do not enter into derivative contracts for trading or speculative purposes. The fair values of the derivatives related to interest rate swap agreements applied to two of our PPA companies designated as cash flow hedges as of March 31, 2019 and December 31, 2018 on our consolidated balance sheets were as follows (in thousands): March 31, December 31, 2019 2018 Assets Prepaid expenses and other current assets $ — $ 42 Other long-term assets 27 40 $ 27 $ 82 Liabilities Accrued other current liabilities $ 108 $ 4 Derivative liabilities 5,611 3,626 $ 5,719 $ 3,630 PPA Company IIIb - In September 2013, PPA Company IIIb entered into an interest rate swap arrangement to convert a variable interest rate debt to a fixed rate. We designated and documented our interest rate swap arrangement as a cash flow hedge. The swap’s term ends on October 1, 2020, which is concurrent with the final maturity of the debt floating interest rates reset on a quarterly basis. We evaluate and calculate the effectiveness of the hedge at each reporting date. The effective change was recorded in accumulated other comprehensive income (loss) and was recognized as interest expense on settlement. The notional amounts of the swap were $24.4 million and $25.4 million as of March 31, 2019 and March 31, 2018 , respectively. We measure the swap at fair value on a recurring basis. Fair value is determined by discounting future cash flows using LIBOR rates with appropriate adjustment for credit risk. We recorded a loss of $12,000 and a loss of $37,000 during the three months ended March 31, 2019 and 2018 , respectively, attributable to the change in swap’s fair value. These gains and losses were included in gain (loss) on revaluation of warrant liabilities and embedded derivatives in the condensed consolidated statement of operations. PPA Company V - In July 2015, PPA Company V entered into nine interest rate swap agreements to convert a variable interest rate debt to a fixed rate. The loss on the swaps prior to designation was recorded in current-period earnings. In July 2015, we designated and documented its interest rate swap arrangements as cash flow hedges. Three of these swaps matured in 2016, three will mature on December 21, 2021 and the remaining three will mature on September 30, 2031. We evaluate and calculate the effectiveness of the hedge at each reporting date. The effective change was recorded in accumulated other comprehensive income (loss) and was recognized as interest expense on settlement. The notional amounts of the swaps were $186.1 million and $188.1 million as of March 31, 2019 and March 31, 2018 , respectively. We measure the swaps at fair value on a recurring basis. Fair value is determined by discounting future cash flows using LIBOR rates with appropriate adjustment for credit risk. We recorded a gain of $24,000 and a gain of $54,000 attributable to the change in valuation during the three months ended March 31, 2019 and 2018 , respectively. These gains were included in gain (loss) on revaluation of warrant liabilities and embedded derivatives in the condensed consolidated statement of operations. The changes in fair value of the derivative contracts designated as cash flow hedges and the amounts recognized in accumulated other comprehensive income (loss) and in earnings for the three months ended March 31, 2019 and 2018 were as follows (in thousands): Three Months Ended March 31, 2019 March 31, 2018 Beginning balance $ 3,548 $ 5,853 Loss (gain) recognized in other comprehensive income (loss) 2,130 (2,640 ) Amounts reclassified from other comprehensive income (loss) to earnings 61 (212 ) Net loss (gain) recognized in other comprehensive income (loss) 2,191 (2,852 ) Gain recognized in earnings (47 ) (92 ) Ending balance $ 5,692 $ 2,909 Natural Gas Derivatives On September 1, 2011, we entered into a fixed price fixed quantity fuel forward contract with a gas supplier. This fuel forward contract is used as part of our program to manage the risk for controlling the overall cost of natural gas. Our PPA Company I is the only PPA Company for which natural gas was provided by us. The fuel forward contract meets the definition of a derivative under U.S. GAAP. We have not elected to designate this contract as a hedge and, accordingly, any changes in its fair value is recorded within cost of revenue in the condensed consolidated statements of operations. The fair value of the contract is determined using a combination of factors including the counterparty’s credit rate and estimates of future natural gas prices. For the three months ended March 31, 2019 and 2018 , we marked-to-market the fair value of our fixed price natural gas forward contract and recorded a gain of $0.4 million and a loss of $0.9 million , respectively. For the three months ended March 31, 2019 and 2018 , we recorded gains of $0.5 million and $1.1 million , respectively, on the settlement of these contracts. Gains and losses are recorded in cost of revenue - electricity in the condensed consolidated statements of operations. 6% Convertible Promissory Notes On December 15, 2015, January 29, 2016, and September 10, 2016, we issued $160.0 million , $25.0 million , and $75.0 million , respectively, of 6% Convertible Promissory Notes (" 6% Notes") that mature in December 2020. The 6% Notes are contractually convertible at the option of the holders at a conversion price per share equal to the lower of $20.61 or 75% of the offering price of our common stock sold in an initial public offering. Upon the IPO, the options are convertible at the option of the holders at the conversion price of $11.25 per share. The valuation of this embedded put feature was recorded as a derivative liability in the consolidated balance sheet, measured each reporting period. Fair value was determined using the binomial lattice method. We recorded $0 and a loss of $7.5 million attributable to the change in valuation for the three months ended March 31, 2019 and 2018 , respectively. These gains and losses were included within loss on revaluation of warrant liabilities and embedded derivatives in gain (loss) on revaluation of warrant liabilities and embedded derivatives in the condensed consolidated statements of operations. Upon the IPO, the final value of the conversion feature was $177.2 million and was reclassified from a derivative liability to additional paid-in capital.

Common Stock Warrants

Common Stock Warrants3 Months Ended
Mar. 31, 2019
Equity [Abstract]
Common Stock WarrantsCommon Stock Warrant s During 2018, all of the preferred and common stock warrants we issued in connection with loan agreements and a dispute settlement converted to warrants to purchase shares of Class B common stock. As of March 31, 2019 and December 31, 2018, we had Class B common stock warrants outstanding to purchase 481,182 and 312,939 shares of Class B common stock at exercise prices of $27.78 and $38.64 , respectively.

Income Taxes

Income Taxes3 Months Ended
Mar. 31, 2019
Income Tax Disclosure [Abstract]
Income TaxesIncome Taxes For the three months ended March 31, 2019 and 2018, we recorded a provision for income taxes of $0.2 million on a pre-tax loss of $88.1 million , and a provision for income taxes of $0.3 million on a pre-tax loss of $22.0 million , respectively. The effective tax impact for the three month periods presented is lower than the statutory federal tax rate primarily due to a full valuation allowance against U.S. deferred tax assets.

Net Loss per Share Attributable

Net Loss per Share Attributable to Common Stockholders3 Months Ended
Mar. 31, 2019
Earnings Per Share [Abstract]
Net Loss per Share Attributable to Common StockholdersNet Loss per Share Attributable to Common Stockholders Net loss per share (basic) attributable to common stockholders is calculated by dividing net loss attributable to common stockholders by the weighted-average shares of common stock outstanding for the period. Net loss per share (diluted) is computed by using the "if-converted" method when calculating the potential dilutive effect, if any, of convertible shares whereby net loss attributable to common stockholders is adjusted by the effect of dilutive securities such as awards under equity compensation plans and inducement awards under separate restricted stock unit ("RSU") award agreements. Net loss per share (diluted) attributable to common stockholders is then calculated by dividing the resulting adjusted net loss attributable to common stockholders by the combined weighted-average number of fully diluted common shares outstanding. In July 2018 , the Company completed an initial public offering of its common shares wherein 20,700,000 shares of Class A common stock were sold into the market. Added to existing shares of Class B common stock were shares mandatorily converted from various financial instruments as a result of the IPO. There were no adjustments to net loss attributable to common stockholders in determining net loss attributable to common stockholders (diluted). Equally, there were no adjustments to the weighted average number of outstanding shares of common stock (basic) in arriving at the weighted average number of outstanding shares (diluted), as such adjustments would have been antidilutive. Net loss per share is the same for each class of common stock as they are entitled to the same liquidation and dividend rights with the exception of voting rights. As a result, net loss per share (basic) and net loss per share (diluted) attributed to common stockholders are the same for both Class A and Class B common stock and are combined for presentation. The following table sets forth the computation of the Company's net loss per share (basic) and net loss per share (diluted) attributable to common stockholders (in thousands, except per share amounts): Three Months Ended 2019 2018 Numerator: Net loss attributable to Class A and Class B common stockholders $ (84,441 ) $ (17,716 ) Denominator: Weighted average shares used to compute net loss per share attributable to Class A and Class B common stockholders, basic and diluted 111,842 10,403 Net loss per share attributable to Class A and Class B common stockholders, basic and diluted $ (0.76 ) $ (1.70 ) The following common stock equivalents (in thousands) were excluded from the computation of net loss per share attributable to common shareholders (diluted) for the periods presented as their inclusion would have been antidilutive: Three Months Ended 2019 2018 Convertible and non-convertible redeemable preferred stock and convertible notes 27,241 85,708 Stock options to purchase common stock 5,190 3,177 Convertible redeemable preferred stock warrants — 60 Convertible redeemable common stock warrants — 312 32,431 89,257

Stock-Based Compensation and Em

Stock-Based Compensation and Employee Benefit Plan3 Months Ended
Mar. 31, 2019
Compensation Related Costs [Abstract]
Stock-Based Compensation and Employee Benefit PlanStock-Based Compensation and Employee Benefit Plan 2002 Stock Plan Our 2002 Stock Plan (the "2002 Plan") was approved in April 2002 and amended in June 2011. In August 2012 and in connection with the adoption of the 2012 Equity Incentive Plan (the "2012 Plan"), shares authorized for issuance under the 2002 Plan were cancelled, except for those shares reserved for issuance upon exercise of outstanding stock options. As of March 31, 2019 , options to purchase 2,232,865 shares of Class B common stock were outstanding and the weighted average exercise price of outstanding options was $21.16 per share. 2012 Equity Incentive Plan Our 2012 Plan was approved in August 2012. In April 2018 and in connection with the adoption of the 2018 Equity Incentive Plan (the "2018 Plan"), any reserved shares not issued were carried over to the 2018 Equity Incentive Plan. As of March 31, 2019 , options to purchase 10,873,302 shares of Class B common stock were outstanding under the 2012 Plan and the weighted average exercise price of outstanding options under the 2012 Plan was $27.12 per share. As of March 31, 2019 , we had outstanding RSU awards that may be settled for 12,267,679 shares of Class B common stock under the 2012 Plan. 2018 Equity Incentive Plan The 2018 Plan was approved in April 2018. The 2018 Plan became effective upon the IPO and will serve as the successor to the 2012 Plan. The 2018 Plan authorizes the award of stock options, restricted stock awards, stock appreciation rights, RSUs, performance awards and stock bonuses. The 2018 Plan provides for the grant of awards to employees, directors, consultants, independent contractors and advisors provided the consultants, independent contractors, directors and advisors render services not in connection with the offer and sale of securities in a capital-raising transaction. The exercise price of stock options is at least equal to the fair market value of Class A common stock on the date of grant. As of March 31, 2019 , options to purchase 1,947,883 shares of Class A common stock were outstanding under the 2018 Plan and the weighted average exercise price of outstanding options was $20.74 per share. As of March 31, 2019 , we had outstanding RSUs that may be settled for 3,980,837 shares of Class A common stock and 20,063,687 shares of Class A common stock were available for future grant. 2018 Employee Stock Purchase Plan In April 2018, we adopted the 2018 Employee Stock Purchase Plan ("ESPP"). The ESPP is qualified under Section 423 of the Internal Revenue Code. As of March 31, 2019, there were 4,052,804 shares of Class A common stock were available for future grant. Stock Option Activity The following table summarizes the stock option activity under our stock plans during the reporting period: Outstanding Options Number of Weighted Remaining Aggregate (in thousands) Balances at December 31, 2018 14,558,420 $ 25.93 6.78 $ 3,084 Granted 743,705 11.38 Exercised (136,382 ) 4.23 Cancelled (111,693 ) 25.44 Balances at March 31, 2019 15,054,050 25.41 6.62 4,686 Vested and expected to vest at March 31, 2019 14,690,193 25.56 6.56 4,645 Exercisable at March 31, 2019 8,555,962 28.18 4.97 3,586 RSUs Activity A summary of our RSUs activity and related information is as follows: Number of Awards Outstanding Weighted Average Grant Date Fair Value Unvested Balance at December 31, 2018 16,784,800 $ 18.74 Granted 2,525,755 12.43 Vested (2,960,462 ) 20.17 Forfeited (101,577 ) 16.44 Unvested Balance at March 31, 2019 16,248,516 17.52 Stock-Based Compensation Expense We used the following weighted-average assumptions in applying the Black-Scholes valuation model: Three Months Ended 2019 2018 Risk-free interest rate 2.60% - 2.64% 2.49% Expected term (years) 6.3 - 6.6 6.2 - 6.5 Expected dividend yield — — Expected volatility 50.20% 55.10% Stock-based Compensation - No stock-based compensation costs were capitalized in the three months ended March 31, 2019 and 2018 . The following table summarizes the components of stock-based compensation expense in the consolidated statements of operations (in thousands): Three Months Ended 2019 2018 Cost of revenue $ 14,372 $ 1,898 Research and development 14,230 1,638 Sales and marketing 11,512 952 General and administrative 23,768 3,468 Total stock-based compensation $ 63,882 $ 7,956 During the three months ended March 31, 2019 and 2018, we recognized $63.9 million and $8.0 million of stock-based compensation expense, respectively. Our stock-based compensation expense is associated with stock options, restricted stock units, or RSUs, and our employee stock purchase plan, or ESPP. As of March 31, 2019 , there was unrecognized compensation expense related to unvested stock options of $65.8 million . This expense is expected to be recognized over the remaining weighted-average period of 2.74 years . We had no excess tax benefits in the three months ended March 31, 2019 and 2018 . As of March 31, 2019 , there was $145.5 million of unrecognized stock-based compensation cost related to unvested RSUs. This expense is expected to be recognized over a weighted average period of 1.27 years . As of March 31, 2019, there was $8.8 million of unrecognized stock-based compensation cost related to the stock purchase plan or ESPP. This expense is expected to be recognized over a weighted average period of 1.16 years .

Power Purchase Agreement Progra

Power Purchase Agreement Programs3 Months Ended
Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Power Purchase Agreement ProgramsPower Purchase Agreement Programs Overview In mid-2010, we began offering our Energy Servers through its Bloom Electrons program, which we denote as Power Purchase Agreement Programs, financed via investment entities. Under these arrangements, an operating entity is created (the "Operating Company") which purchases the Energy Server from us. The end customer then enters into a power purchase agreement ("PPA") with the Operating Company to purchase the power generated by the Energy Server(s) at a specified rate per kilowatt hour for a specified term which can range from 10 to 21 years. In some cases similar to direct purchases and leases, the standard one -year warranty and performance guaranties are included in the price of the product. The Operating Company also enters into a master services agreement ("MSA") with us following the first year of service to extend the warranty services and guaranties over the term of the PPA. In other cases, the MSA including warranties and guaranties are billed on a quarterly basis starting in the first quarter following the placed-in-service date of the energy server(s) and continuing over the term of the PPA. The first of such arrangements was considered a sales-type lease and the product revenue from that agreement was recognized up front in the same manner as direct purchase and lease transactions. Substantially all of our subsequent PPAs have been accounted for as operating leases with the related revenue under those agreements recognized ratably over the PPA term as electricity revenue. We recognize the cost of revenue, primarily product costs and maintenance service costs, over the shorter of the estimated useful life of the Energy Server or the term of the PPA. We and our third-party equity investors (together "Equity Investors") contribute funds into a limited liability investment entity ("Investment Company") that owns and is parent to the Operating Company (together, the "PPA Entities"). The PPA Entities constitute variable investment entities ("VIEs") under U.S. GAAP. We have considered the provisions within the contractual agreements which grant us power to manage and make decisions affecting the operations of these VIEs. We consider that the rights granted to the Equity Investors under the contractual agreements are more protective in nature rather than participating. Therefore, we have determined under the power and benefits criterion of ASC 810 - Consolidations that we are the primary beneficiary of these VIEs. As the primary beneficiary of these VIEs, we consolidate in its financial statements the financial position, results of operations and cash flows of the PPA Entities, and all intercompany balances and transactions between us and the PPA Entities are eliminated in the consolidated financial statements. The Operating Company acquires Energy Servers from us for cash payments that are made on a similar schedule as if the Operating Company were a customer purchasing an Energy Server from us outright. In the consolidated financial statements, the sales of our Energy Servers to the Operating Company are treated as intercompany transactions after the elimination of intercompany balances. The acquisition of Energy Servers by the Operating Company is accounted for as a non-cash reclassification from inventory to Energy Servers within property, plant and equipment, net on our condensed consolidated balance sheets. In arrangements qualifying for sales-type leases, we reduce these recorded assets by amounts received from U.S. Treasury Department cash grants and from similar state incentive rebates. The Operating Company sells the electricity to end customers under PPAs. Cash generated by the electricity sales, as well as receipts from any applicable government incentive program, is used to pay operating expenses (including the management and services we provide to maintain the Energy Servers over the term of the PPA) and to service the non-recourse debt with the remaining cash flows distributed to the Equity Investors. In transactions accounted for as sales-type leases, we recognize subsequent customer billings as electricity revenue over the term of the PPA and amortizes any applicable government incentive program grants as a reduction to depreciation expense of the Energy Server over the term of the PPA. In transactions accounted for as operating leases, we recognize subsequent customer payments and any applicable government incentive program grants as electricity revenue over the term of the PPA. Upon sale or liquidation of a PPA Entity, distributions would occur in the order of priority specified in the contractual agreements. We established six different PPA Entities to date. The contributed funds are restricted for use by the Operating Company to the purchase of Energy Servers manufactured by us in our normal course of operations, all six PPA Entities utilized their entire available financing capacity and have completed the purchase of their Energy Servers. Any debt incurred by the Operating Companies is non-recourse to us. Under these structures, each Investment Company is treated as a partnership for U.S. federal income tax purposes. Equity Investors receive investment tax credits and accelerated tax depreciation benefits. In 2016, we purchased the tax equity investor’s interest in PPA Company I ("PPA I"), which resulted in a change in our ownership interest in PPA I while we continued to hold the controlling financial interest in this company. The table below shows the details of the five continuing Investment Companies and their cumulative activities from inception to the periods indicated (dollars in thousands): PPA Company II PPA Company IIIa PPA Company IIIb PPA Company IV PPA Company V Overview: Maximum size of installation (in megawatts) 30 10 6 21 40 Installed size (in megawatts) 30 10 5 19 37 Term of power purchase agreements (years) 21 15 15 15 15 First system installed Jun-12 Feb-13 Aug-13 Sep-14 Jun-15 Last system installed Nov-13 Jun-14 Jun-15 Mar-16 Dec-16 Income (loss) and tax benefits allocation to Equity Investor 99% 99% 99% 90% 99% Cash allocation to Equity Investor 99% 99% 99% 90% 90% Income (loss), tax and cash allocations to Equity Investor after the flip date 5% 5% 5% No flip No flip Equity Investor ¹ Credit Suisse US Bank US Bank Exelon Corporation Exelon Corporation Put option date ² 10th anniversary of initial funding date 1st anniversary of flip point 1st anniversary of flip point N/A N/A Company cash contributions $ 22,442 $ 32,223 $ 22,658 $ 11,669 $ 27,932 Company non-cash contributions ³ $ — $ 8,655 $ 2,082 $ — $ — Equity Investor cash contributions $ 139,993 $ 36,967 $ 20,152 $ 84,782 $ 227,344 Debt financing $ 144,813 $ 44,968 $ 28,676 $ 99,000 $ 131,237 Cumulative Activity as of March 31, 2019: Distributions to Equity Investor $ 116,942 $ 4,246 $ 1,907 $ 4,982 $ 68,944 Debt repayment—principal $ 67,985 $ 5,209 $ 4,238 $ 16,111 $ 6,644 Cumulative Activity as of December 31, 2018: Distributions to Equity Investor $ 116,942 $ 4,063 $ 1,807 $ 4,568 $ 66,745 Debt repayment—principal $ 65,114 $ 4,431 $ 3,953 $ 15,543 $ 5,780 ¹ Investor name represents ultimate parent of subsidiary financing the project. ² Investor right on the certain date, upon giving us advance written notice, to sell the membership interests to us or resign or withdraw from the investment partnership. ³ Non-cash contributions consisted of warrants that were issued by us to respective lenders to each PPA Entity, as required by such entity’s credit agreements. The corresponding values are amortized using the effective interest method over the debt term. Some of our PPA Entities contain structured provisions whereby the allocation of income and equity to the Equity Investors changes at some point in time after the formation of the PPA Entity. The change in allocations to Equity Investors (or the "flip") occurs based either on a specified future date or once the Equity Investors reaches its targeted rate of return. For PPA Entities with a specified future date for the flip, the flip occurs January 1 of the calendar year immediately following the year that includes the fifth anniversary of the date the last site achieves commercial operation. The noncontrolling interests in PPA Company II, PPA Company IIIa and PPA Company IIIb are redeemable as a result of the put option held by the Equity Investors. The redemption value is the put amount. At March 31, 2019 , and December 31, 2018 , the carrying value of redeemable noncontrolling interests of $58.8 million and $57.3 million , respectively, exceeded the maximum redemption value. PPA Entities’ Aggregate Assets and Liabilities Generally, Operating Company assets can be used to settle only the Operating Company obligations and Operating Company creditors do not have recourse to us. The aggregate carrying values of the PPA Entities’ assets and liabilities in the consolidated balance sheets, after eliminations of intercompany transactions and balances, were as follows (in thousands): March 31, December 31, 2019 2018 Assets Current assets: Cash and cash equivalents $ 9,071 $ 5,295 Restricted cash 5,040 2,917 Accounts receivable 7,431 7,516 Customer financing receivable 5,717 5,594 Prepaid expenses and other current assets 3,172 4,909 Total current assets 30,431 26,231 Property and equipment, net 391,121 399,060 Customer financing receivable, non-current 65,620 67,082 Restricted cash 27,851 27,854 Other long-term assets 2,614 2,692 Total assets $ 517,637 $ 522,919 Liabilities Current liabilities: Accounts payable $ 426 $ 724 Accrued other current liabilities 1,100 1,442 Deferred revenue and customer deposits 786 786 Current portion of debt 21,827 21,162 Total current liabilities 24,139 24,114 Derivative liabilities, net of current portion 5,611 3,626 Deferred revenue, net of current portion 8,502 8,696 Long-term portion of debt 317,958 323,360 Other long-term liabilities 1,938 1,798 Total liabilities $ 358,148 $ 361,594 As stated above, we are a minority shareholder in the PPA Entities for the administration of our Bloom Electrons program. PPA Entities contain debt that is non-recourse to us. The PPA Entities also own Energy Server assets for which we do not have title. Although we will continue to have Power Purchase Agreement Program entities in the future and offer customers the ability to purchase electricity without the purchase of Energy Servers, we do not intend to be a minority investor in any new Power Purchase Agreement Program entities. We believe that by presenting assets and liabilities separate from the PPA Entities, we provide a better view of the true operations of our core business. The table below provides detail into the assets and liabilities of Bloom Energy separate from the PPA Entities. The following table shows Bloom Energy's stand-alone, the PPA Entities combined and these consolidated balances as of March 31, 2019 , and December 31, 2018 (in thousands): March 31, 2019 December 31, 2018 Bloom PPA Entities Consolidated Bloom PPA Entities Consolidated Assets Current assets $ 609,411 $ 30,431 $ 639,842 $ 646,350 $ 26,231 $ 672,581 Long-term assets 191,802 487,206 679,008 220,399 496,688 717,087 Total assets $ 801,213 $ 517,637 $ 1,318,850 $ 866,749 $ 522,919 $ 1,389,668 Liabilities Current liabilities $ 236,372 $ 2,312 $ 238,684 $ 246,866 $ 2,952 $ 249,818 Current portion of debt 15,683 21,827 37,510 8,686 21,162 29,848 Long-term liabilities 255,010 16,051 271,061 293,739 14,120 307,859 Long-term portion of debt 385,610 317,958 703,568 388,073 323,360 711,433 Total liabilities $ 892,675 $ 358,148 $ 1,250,823 $ 937,364 $ 361,594 $ 1,298,958

Commitments and Contingencies

Commitments and Contingencies3 Months Ended
Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and ContingenciesCommitments and Contingencies Commitments Operating Leases During the three months ended March 31, 2019 and 2018 , rent expense for our facilities was $2.0 million and $1.4 million , respectively. At March 31, 2019 , future minimum lease payments under operating leases were as follows (in thousands): Remainder of 2019 $ 13,491 2020 18,785 2021 16,169 2022 15,673 2023 15,335 Thereafter 57,310 $ 136,763 Equipment Leases - Beginning in December 2015, the Company is a party to master lease agreements that provide for the sale of Energy Servers to third parties and the simultaneous leaseback of the systems which we then subleases to customers. The lease agreements expire on various dates through 2025 and there was no recorded rent expense for the three months ended March 31, 2019 and 2018 . Purchase Commitments with Suppliers and Contract Manufacturers - In order to reduce manufacturing lead-times and to ensure an adequate supply of inventories, we have agreements with our component suppliers and contract manufacturers to allow long lead-time component inventory procurement based on a rolling production forecast. We are contractually obligated to purchase long lead-time component inventory procured by certain manufacturers in accordance with our forecasts. We can generally give notice of order cancellation at least 90 days prior to the delivery date. However, we may also issue purchase orders to certain of our component suppliers and third-party manufacturers that may not be cancelable. As of March 31, 2019 and 2018 , we had no material open purchase orders with our component suppliers and third-party manufacturers that are not cancelable. Power Purchase Agreement Program - Under the terms of the Bloom Electrons program (see Note 12 - Power Purchase Agreement Programs ), customers agree to purchase power from our Energy Servers at negotiated rates, generally for periods of up to twenty-one years. We are responsible for all operating costs necessary to maintain, monitor and repair these Energy Servers, including the fuel necessary to operate the systems under certain PPA contracts. The risk associated with the future market price of fuel purchase obligations is mitigated with commodity contract futures. The PPA Entities guarantee the performance of Energy Servers at certain levels of output and efficiency to its customers over the contractual term. The PPA Entities monitor the need for any accruals arising from such guaranties, which are calculated as the difference between committed and actual power output or between natural gas consumption at warranted efficiency levels and actual consumption, multiplied by the contractual rates with the customer. Amounts payable under these guaranties are accrued in periods when the guaranties are not met and are recorded in cost of service revenue in the consolidated statements of operations. We paid $3.5 million and $0.9 million for the three months ended March 31, 2019 and 2018 , respectively. In June 2015, PPA V entered into a $131.2 million credit agreement to fund the purchase and installation of Energy Servers. The lenders have commitments to an LC facility with the aggregate principal amount of $6.2 million . The LC facility is to fund the Debt Service Reserve Account. The amount reserved under the LC as of March 31, 2019 and 2018 was $5.0 million and $5.0 million , respectively. Contingencies Indemnification Agreements - We enter into standard indemnification agreements with our customers and certain other business partners in the ordinary course of business. Our exposure under these agreements is unknown because it involves future claims that may be made against us but have not yet been made. To date, we have not paid any claims or been required to defend any action related to its indemnification obligations. However, we may record charges in the future as a result of these indemnification obligations. Warranty Costs - We generally warrant our products sold to our direct customers for one year following the date of acceptance of the products under a standard one-year warranty. As part of its MSAs, we provide output and efficiency guaranties (collectively “performance guaranties”) to our customers when systems operate below contractually specified levels of efficiency and output. Such amounts have not been material to date. The standard one-year warranty covers defects in materials and workmanship under normal use and service conditions, and against manufacturing or performance defects. We accrue this warranty expense using our best estimate of the amount necessary to settle future and existing warranty claims as of the balance sheet date. Our obligations under its standard one-year warranty and MSA agreements are generally in the form of product replacement, repair or reimbursement for higher customer electricity costs. Further, if the Energy Servers run at a lower efficiency or power output than we committed under our performance guaranty, we will reimburse the customer for the underperformance. Our aggregate reimbursement obligation for this performance guaranty for each order is capped at a portion of the purchase price. Prior to fiscal year 2014, certain MSAs with direct customers were accounted for as separately-priced warranty contracts under ASC 605-20-25 Separately Priced Extended Warranty and Product Maintenance Contracts (formerly FTB 90-1), in which we recorded an accrual for any expected costs that exceed the contracted revenues for that one-year service renewal arrangement, and is included as a component of the accrued warranty liability. Customers may renew the MSAs leading to future expense that is not recognized under GAAP until the renewal occurs. Over time, as our service offering evolved and we began managing the Energy Servers taking into consideration individual customer arrangements as well as our Bloom Energy Server fleet management objectives, our service offering evolved to the point that our services changed, becoming a more strategic offering for both us and our customers. Additionally, virtually all of our sales arrangements included bundled sales of maintenance service agreements along with the Energy Servers. The result is that we allocate a certain portion of the contractual revenue related to the Energy Servers to the MSAs based on our BESP compared to the stated amount in the service contracts. Delaware Economic Development Authority - In March 2012, we entered into an agreement with the Delaware Economic Development Authority to provide a grant of $16.5 million as an incentive to establish a new manufacturing facility in Delaware and to provide employment for full time workers at the facility over a certain period of time. The grant contains two types of milestones that we must complete to retain the entire amount of the grant proceeds. The first milestone was to provide employment for 900 full time workers in Delaware by the end of the first recapture period of September 30, 2017 . The second milestone was to pay these full time workers a cumulative total of $108.0 million in compensation by September 30, 2017 . There are two additional recapture periods at which time we must continue to employ 900 full time workers and the cumulative total compensation paid by us is required to be at least $324.0 million by September 30, 2023 . As of March 31, 2019 , we had 334 full time workers in Delaware and paid $99.3 million in cumulative compensation. As of December 31, 2018 , we had 338 full time workers in Delaware and paid $92.0 million in cumulative compensation. We have so far received $12.0 million of the grant which is contingent upon meeting the milestones through September 30, 2023 . In the event that we do not meet the milestones, we may have to repay the Delaware Economic Development Authority, including up to $5.0 million on September 30, 2021 and up to an additional $2.5 million on September 30, 2023 . As of March 31, 2019 we had cumulatively paid $1.5 million for recapture provisions and recorded $10.5 million in other long-term liabilities for potential recapture. Self-Generation Incentive Program ("SGIP") - Our PPA Entities’ customers receive payments under the SGIP which is a program specific to the State of California that provides financial incentives for the installation of qualifying new self-generation equipment that we own. The SGIP program issues 50% of the fully anticipated amount in the first year the equipment is placed into service. The remaining incentive is then paid based on the size of the equipment (i.e., nameplate kilowatt capacity) over the subsequent five years . The SGIP program has operational criteria primarily related to fuel mixture and minimum output for the first five years after the qualified equipment is placed in service. If the operational criteria are not fulfilled, it could result in a partial refund of funds received. However, for certain PPA Entities, we make SGIP reservations on behalf of the PPA Entity and, therefore, the PPA Entity bears the risk of loss if these funds are not paid. Investment Tax Credits ("ITCs") - Our Energy Servers are eligible for federal ITCs that accrued to qualified property under Internal Revenue Code Section 48 when placed into service. However, the ITC program has operational criteria that extend for five years. If the energy property is disposed or otherwise ceases to be qualified investment credit property before the close of the five year recapture period is fulfilled, it could result in a partial reduction of the incentives. The purchase of Energy Servers were made by the PPA Entities and, therefore, the PPA Entities bear the risk of repayment if the assets placed in service do not meet the ITC operational criteria in the future. Legal Matters - From time to time, we are involved in disputes, claims, litigation, investigations, proceedings and/or other legal actions consisting of commercial, securities and employment matters that arise in the ordinary course of business. We review all legal matters at least quarterly and assesses whether an accrual for loss contingencies needs to be recorded. The assessment reflects the impact of negotiations, settlements, rulings, advice of legal counsel and other information and events pertaining to a particular situation. We record an accrual for loss contingencies when management believes that it is both probable that a liability has been incurred and the amount of the loss can be reasonably estimated. Legal matters are subject to uncertainties and are inherently unpredictable, so the actual liability in any such matters may be materially different from our estimates. If an unfavorable resolution were to occur, there exists the possibility of a material adverse impact on the consolidated financial condition, results of operations or cash flows for the period in which the resolution occurs or on future periods. In July 2018, two former executives of Advanced Equities, Inc., Keith Daubenspeck and Dwight Badger, filed a Statement of Claim with the American Arbitration Association in Santa Clara, CA, against us, Kleiner Perkins, Caufield & Byers, LLC (“KPCB”), New Enterprise Associates, LLC (“NEA”) and affiliated entities of both KPCB and NEA seeking to compel arbitration and alleging a breach of a confidential agreement executed between the parties on June 27, 2014 (“Confidential Agreement”). This Statement of Claim sought, among other things, to void the indemnification and confidentiality provisions under the Confidential Agreement and to recover attorneys’ fees and costs. The Statement of Claim was dismissed without prejudice on July 22, 2018. On September 19, 2018, an Amended Statement of Claim was filed by Messrs. Daubenspeck and Badger with the American Arbitration Association in Santa Clara, CA, against the parties. The Amended Statement of Claim alleges a breach of the Confidentiality Agreement and fraud in the inducement, securities fraud, racketeering and other claims. On May 7, 2019, KPCB and NEA were dismissed with prejudice. No date has yet been set for our response. We believe the Amended Statement of Claim to be without merit and as a result, we have recorded no loss contingency related to this claim. In March of 2019, the Lincolnshire Police Pension fund filed a class action complaint in the Superior Court of the State of California, County of Santa Clara against us, certain members of our senior management, certain of our directors and the underwriters in our initial public offering alleging violations under Sections 11 and 15 of the Securities Act of 1933, as amended, for misleading statements or omissions in our Form S-1 Registration Statement in connection with our July 25, 2018 initial public offering. Two related class action cases were subsequently filed in the Santa Clara County Superior Court against the same defendants containing the same allegations; Rodriquez vs Bloom Energy et al was filed on April 22, 2019 and Evan vs Bloom Energy et al. was filed on May 7, 2019. As related cases, we expect they will be consolidated and a case management schedule set. Discovery is currently stayed.

Segment Information

Segment Information3 Months Ended
Mar. 31, 2019
Risks and Uncertainties [Abstract]
Segment Information Segment Information Segments and the Chief Operating Decision Maker The Company’s chief operating decision makers ("CODMs"), the Chief Executive Officer and the Chief Financial Officer, review financial information presented on a consolidated basis for purposes of allocating resources and evaluating financial performance. The CODMs allocate resources and make operational decisions based on direct involvement with the Company’s operations and product development efforts. The Company is managed under a functionally-based organizational structure with the head of each function reporting to the Chief Executive Officer. The CODMs assess performance, including incentive compensation, based upon consolidated operations performance and financial results on a consolidated basis. As such, the Company has a single reporting segment and operating unit structure.

Related Party Transactions

Related Party Transactions3 Months Ended
Mar. 31, 2019
Related Party Transactions [Abstract]
Related Party Transactions Related Party Transactions Our results of operations included the following related party transactions (in thousands): Three Months Ended 2019 2018 Total revenue from related parties $ 813 $ 29,269 Consulting expenses paid to related parties (included in general and administrative expense) 50 51 Interest expense on debt to related parties 1,612 2,627 Bloom Energy Japan Limited In May 2013, we entered into a joint venture with Softbank Corp., which is accounted for as an equity method investment. Under this arrangement, we sell Energy Servers and provide maintenance services to the joint venture. Accounts receivable from this joint venture was $2.7 million as of March 31, 2019 and $2.4 million as of December 31, 2018. Consulting Arrangement In January 2009, we entered into a consulting agreement with General Colin L. Powell, a member of our board of directors, pursuant to which General Powell performs certain strategic planning and advisory services for us. Pursuant to this consulting agreement, General Powell receives compensation of $125,000 per year and reimbursement for reasonable expenses. Debt to Related Parties The following is a summary of our debt and convertible notes from investors considered to be related parties as of March 31, 2019 (in thousands): Unpaid Net Carrying Value Current Long- Total Recourse debt from related parties: 6% convertible promissory notes due December 2020 from related parties $ 27,734 $ — $ 27,734 $ 27,734 Non-recourse debt from related parties: 7.5% term loan due September 2028 from related parties 39,759 2,341 33,417 35,758 Total debt from related parties $ 67,493 $ 2,341 $ 61,151 $ 63,492 The following is a summary of our debt and convertible notes from investors considered to be related parties as of December 31, 2018 (in thousands): Unpaid Net Carrying Value Current Long- Total Recourse debt from related parties: 6% convertible promissory notes due December 2020 from related parties $ 27,734 $ — $ 27,734 $ 27,734 Non-recourse debt from related parties: 7.5% term loan due September 2028 from related parties 40,538 2,200 34,119 36,319 Total debt from related parties $ 68,272 $ 2,200 $ 61,853 $ 64,053 Regarding non-recourse debt from related parties, we repaid $0.8 million and $0.8 million of principal and interest, respectively, in the three months ended March 31, 2019 . No other significant changes have occurred in total debt from related parties since December 31, 2018. See Note 6 - Outstanding Loans and Security Agreements for additional information on our debt facilities. During the three months ended March 31, 2019 and 2018, interest expense on debt from related parties was $1.6 million and $2.6 million , respectively.

Subsequent Events

Subsequent Events3 Months Ended
Mar. 31, 2019
Subsequent Events [Abstract]
Subsequent EventsSubsequent Events There have been no other subsequent events that occurred during the period subsequent to the date of these financial statements that would require adjustment to, or disclosure in, the financial statements as presented.

Basis of Presentation and Sig_2

Basis of Presentation and Significant Accounting Policies (Policies)3 Months Ended
Mar. 31, 2019
Accounting Policies [Abstract]
Unaudited Interim Consolidated Financial StatementsWe have prepared the condensed consolidated financial statements included herein pursuant to the rules and regulations of the U.S. Securities and Exchange Commission ("SEC"). Certain information and footnote disclosures normally included in the consolidated balance sheets as of March 31, 2019 and December 31, 2018 , the consolidated statements of operations, the consolidated statements of comprehensive loss, the consolidated statements of convertible redeemable preferred stock, redeemable noncontrolling interest, stockholders' deficit and noncontrolling interest, and the consolidated statements of cash flows for the three months ended March 31, 2019 and 2018 , as well as other information disclosed in the accompanying notes have been prepared in accordance with U.S. generally accepted accounting principles as applied in the United States ("U.S. GAAP") have been condensed or omitted pursuant to such rules and regulations. However, we believe that the disclosures herein are adequate to ensure the information presented is not misleading. These unaudited condensed consolidated financial statements should be read in conjunction with the audited financial statements and the notes thereto included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2018 . We believe that all necessary adjustments, which consisted only of normal recurring items, have been included in the accompanying financial statements to fairly state the results of the interim periods. The results of operations for the interim periods presented are not necessarily indicative of the operating results to be expected for any subsequent interim period or for our fiscal year ending December 31, 2019.
Principles of ConsolidationPrinciples of Consolidation These condensed consolidated financial statements reflect our accounts and operations and those of our subsidiaries in which we have a controlling financial interest. We use a qualitative approach in assessing the consolidation requirement for each of our variable interest entities, which we refer to as our power purchase agreement entities ("PPA Entities"). This approach focuses on determining whether we have the power to direct those activities of the PPA Entities that most significantly affect their economic performance and whether we have the obligation to absorb losses, or the right to receive benefits, that could potentially be significant to the PPA Entities. For all periods presented, we have determined that we are the primary beneficiary in all of its operational PPA Entities. We evaluate our relationships with the PPA Entities on an ongoing basis to ensure that we continues to be the primary beneficiary. All intercompany transactions and balances have been eliminated in consolidation.
Use of EstimatesUse of Estimates The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires us to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and the accompanying notes. Significant estimates include assumptions used to compute the best estimate of selling-prices, the fair value of lease and non-lease components such as estimated output, efficiency and residual value of the Energy Servers, estimates for inventory write-downs, estimates for future cash flows and the economic useful lives of property, plant and equipment, the valuation of other long-term assets, the valuation of certain accrued liabilities such as derivative valuations, estimates for accrued warranty and extended maintenance, estimates for recapture of U.S. Treasury grants and similar grants, estimates for income taxes and deferred tax asset valuation allowances, warrant liabilities, stock-based compensation costs and estimates for the allocation of profit and losses to the noncontrolling interests. Actual results could differ materially from these estimates under different assumptions and conditions.
Fair Value MeasurementFair Value Measurement Financial Accounting Standards Board ("FASB") Accounting Standards Codification Topic 820 - Fair Value Measurements and Disclosures ("ASC 820"), defines fair value, establishes a framework for measuring fair value under U.S. GAAP and enhances disclosures about fair value measurements. Fair value is defined under ASC 820 as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value under ASC 820 must maximize the use of observable inputs and minimize the use of unobservable inputs. The guidance describes a fair value hierarchy based on three levels of inputs, of which the first two are considered observable and the last unobservable, that may be used to measure fair value: Level 1 Quoted prices in active markets for identical assets or liabilities. Financial assets utilizing Level 1 inputs typically include money market securities and U.S. Treasury securities. Level 2 Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Financial instruments utilizing Level 2 inputs include interest rate swaps. Level 3 Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Financial liabilities utilizing Level 3 inputs include natural gas fixed price forward contract derivatives. Derivative liability valuations are performed based on a binomial lattice model and adjusted for illiquidity and/or nontransferability and such adjustments are generally based on available market evidence.
Recent Accounting PronouncementsRecent Accounting Pronouncements Accounting Guidance Implemented in Fiscal Year 2019 Other than the adoption of accounting guidances mentioned below, there have been no other significant changes in our reported financial position or results of operations and cash flows resulting from the adoption of new accounting pronouncements. There have been no changes to our significant accounting policies that were disclosed in our Annual Report on Form 10-K for the fiscal year ended December 31, 2018 that have had a significant impact on our condensed consolidated financial statements or notes thereto as of and for the three months ended March 31, 2019. Hedging Activities - During the first three months of fiscal 2019, we adopted Accounting Standards Update ("ASU") 2017-12 Derivatives and Hedging (Topic 815), Targeted Improvements to Accounting for Hedging Activities ("ASU 2017-12") to help entities recognize the economic results of their hedging strategies in the financial statements so that stakeholders can better interpret and understand the effect of hedge accounting on reported results. It is intended to more clearly disclose an entity’s risk exposures and how we manage those exposures through hedging, and it is expected to simplify the application of hedge accounting guidance. The new guidance is effective for annual periods beginning after December 15, 2018, with early adoption permitted. We adopted this standard on January 1, 2019. There was not a material impact to our condensed consolidated financial statements upon adoption. Income Taxes - During the first three months of fiscal 2019, we adopted ASU 2016-16, Income Taxes—Intra-Entity Transfers of Assets Other Than Inventory (Topic 740) , which requires that entities recognize the income tax consequences of an intra-entity transfer of an asset, other than inventory, when the transfer occurs. The standard is effective for us in our Annual Report on Form 10-K for the fiscal year ended December 31, 2019 and is required to be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the adoption period. Adoption of this standard had no impact on our consolidated financial statements. Income Taxes - During the first three months of fiscal 2019, we adopted ASU 2018-02 Income Statement—Reporting Comprehensive Income (Topic 220) Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income ("ASU 2018-02"), which permits reclassification of certain tax effects in Other Comprehensive Income ("OCI") caused by the U.S. tax reform enacted in December 2017 to retained earnings. We do not have any tax effect (due to full valuation allowance) in our OCI account, thus this guidance has no impact on us. New Accounting Guidance to be Implemented Revenue Recognition - In May 2014, the FASB issued ASU 2014-14, Revenue From Contracts With Customers, as amended ("ASU 2014-14" ) . The guidance provides principles for recognizing revenue for the transfer of promised goods or services to customers with the consideration to which the entity expects to be entitled in exchange for those goods or services, as well as guidance on the recognition of costs related to obtaining and fulfilling customer contracts. The guidance also requires expanded disclosures about the nature, amount, timing, and uncertainty of revenues and cash flows arising from customer contracts, including significant judgments and changes in judgments. ASU 2014-14 is effective for our annual period beginning January 1, 2019, and for our interim periods beginning on January 1, 2020. ASU 2014-14 can be adopted using either of two methods: (i) retrospective to each prior reporting period presented with the option to elect certain practical expedients as defined within the guidance (“full retrospective method”); or (ii) retrospective with the cumulative effect of initially applying the guidance recognized at the date of initial application and providing certain additional disclosures as defined per the guidance (“modified retrospective method”). We will adopt ASU 2014-14 for our fiscal year ended December 31, 2019 using the modified retrospective method, resulting in a cumulative-effect adjustment to retained earnings on January 1, 2019. We are currently evaluating whether ASU 2014-14 will have a material impact on our consolidated financial statements and expect its adoption to have an impact related to the costs of obtaining our contracts, customer deposits, and deferred revenue. Further, in preparation for ASU 2014-14, we are in the process of updating our accounting policies, processes, internal controls over financial reporting, and system requirements. Leases - In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) , as amended, which provides new authoritative guidance on lease accounting. Among its provisions, the standard requires lessees to recognize right-of-use assets and lease liabilities on the balance sheet for operating leases and also requires additional qualitative and quantitative disclosures about lease arrangements. In March 2019 the FASB issued further guidance in ASU 2019-01, Leases (Topic 842) , which provides clarifications to certain lessor transactions and other reporting matters. This guidance will be effective for us beginning January 1, 2020, and requires the modified retrospective method of adoption. Early adoption is permitted. We expect to adopt this guidance on January 1, 2020 and expect to recognize right of use assets and lease liabilities for contracts currently recognized as operating leases where we are the lessee.

Financial Instruments (Tables)

Financial Instruments (Tables)3 Months Ended
Mar. 31, 2019
Cash and Cash Equivalents [Abstract]
Schedule of Cash and Cash EquivalentsThe carrying value of cash and cash equivalents approximate fair value and are as follows (in thousands): March 31, December 31, 2019 2018 As held: Cash $ 152,676 $ 136,642 Money market funds 217,258 143,843 $ 369,934 $ 280,485 As reported: Cash and cash equivalents $ 320,414 $ 220,728 Restricted cash 49,520 59,757 $ 369,934 $ 280,485
Restrictions on Cash and Cash EquivalentsThe carrying value of cash and cash equivalents approximate fair value and are as follows (in thousands): March 31, December 31, 2019 2018 As held: Cash $ 152,676 $ 136,642 Money market funds 217,258 143,843 $ 369,934 $ 280,485 As reported: Cash and cash equivalents $ 320,414 $ 220,728 Restricted cash 49,520 59,757 $ 369,934 $ 280,485 Restricted cash consisted of the following (in thousands): March 31, December 31, 2019 2018 Current Restricted cash $ 13,379 $ 25,740 Restricted cash related to PPA Entities 5,040 2,917 Restricted cash, current 18,419 28,657 Non-current Restricted cash 3,250 3,246 Restricted cash related to PPA Entities 27,851 27,854 Restricted cash, non-current 31,101 31,100 $ 49,520 $ 59,757

Fair Value (Tables)

Fair Value (Tables)3 Months Ended
Mar. 31, 2019
Fair Value Disclosures [Abstract]
Fair Value, Assets and Liabilities Measured on Recurring BasisThe tables below sets forth, by level, our financial assets that were accounted for at fair value for the respective periods. The table does not include assets and liabilities that are measured at historical cost or any basis other than fair value (in thousands): Fair Value Measured at Reporting Date Using March 31, 2019 Level 1 Level 2 Level 3 Total Assets Cash equivalents: Money market funds $ 217,258 $ — $ — $ 217,258 Interest rate swap agreements — 27 — 27 $ 217,258 $ 27 $ — $ 217,285 Liabilities Accrued other current liabilities $ 1,723 $ — $ — $ 1,723 Derivatives: Natural gas fixed price forward contracts — — 8,796 8,796 Interest rate swap agreements 1 — 5,719 — 5,719 $ 1,723 $ 5,719 $ 8,796 $ 16,238 1 As of March 31, 2019 , $0.1 million of the gain on the interest rate swaps accumulated in other comprehensive income (loss) is expected to be reclassified into earnings in the next twelve months. Fair Value Measured at Reporting Date Using December 31, 2018 Level 1 Level 2 Level 3 Total Assets Cash equivalents: Money market funds $ 143,843 $ — $ — $ 143,843 Short-term investments 104,350 — — 104,350 Interest rate swap agreements — 82 — 82 $ 248,193 $ 82 $ — $ 248,275 Liabilities Accrued other current liabilities $ 1,331 $ — $ — $ 1,331 Derivatives: Natural gas fixed price forward contracts — — 9,729 9,729 Interest rate swap agreements — 3,630 — 3,630 $ 1,331 $ 3,630 $ 9,729 $ 14,690
Schedule of Natural Gas Forward ContractsThe following table provides the fair value of our natural gas fixed price contracts (dollars in thousands): March 31, December 31, 2019 2018 Number of Contracts (MMBTU)² Fair Value Number of Fair Value Liabilities ¹ Natural gas fixed price forward contracts (not under hedging relationships) 2,873 $ 8,796 3,096 $ 9,729 ¹ Recorded in current liabilities and derivative liabilities in the condensed consolidated balance sheets. ² One MMBTU, or one million British Thermal Units, is a traditional unit of energy used to describe the heat value (energy content) of fuels.
Change in Level 3 Financial LiabilitiesThe changes in the Level 3 financial assets were as follows (in thousands): Natural Gas Fixed Price Forward Contracts Preferred Stock Warrants Embedded Derivative Liability Total Balances at December 31, 2018 $ 9,729 $ — $ — $ 9,729 Settlement of natural gas fixed price forward contracts (527 ) — — (527 ) Changes in fair value (406 ) — — (406 ) Balances at March 31, 2019 $ 8,796 $ — $ — $ 8,796 Natural Preferred Embedded Total Balances at December 31, 2017 $ 15,368 $ 9,825 $ 140,771 $ 165,964 Settlement of natural gas fixed price forward contracts (1,102 ) — — (1,102 ) Changes in fair value 855 (3,271 ) 9,732 7,316 Balances at March 31, 2018 $ 15,121 $ 6,554 $ 150,503 $ 172,178
Schedule of Fair Values and Carrying Values of Customer Receivables and Debt InstrumentsThe following table presents the estimated fair values and carrying values of customer receivables and debt instruments (in thousands): March 31, 2019 December 31, 2018 Net Carrying Value Fair Value Net Carrying Value Fair Value Customer receivables: Customer financing receivables $ 71,337 $ 51,312 $ 72,676 $ 51,541 Debt instruments: Recourse LIBOR + 4% term loan due November 2020 2,795 2,914 3,214 3,311 5% convertible promissory note due December 2020 35,136 33,832 34,706 31,546 6% convertible promissory notes due December 2020 267,289 418,999 263,284 353,368 10% notes due July 2024 96,073 99,598 95,555 99,260 Non-recourse 5.22% senior secured notes due March 2025 75,786 79,341 78,566 80,838 7.5% term loan due September 2028 35,758 41,759 36,319 39,892 LIBOR + 5.25% term loan due October 2020 23,734 25,679 23,916 25,441 6.07% senior secured notes due March 2030 81,806 88,715 82,337 85,917 LIBOR + 2.5% term loan due December 2021 122,701 125,770 123,384 123,040

Balance Sheet Components (Table

Balance Sheet Components (Tables)3 Months Ended
Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Inventory, netThe components of inventory consisted of the following (in thousands): March 31, December 31, 2019 2018 Raw materials $ 42,965 $ 53,273 Work-in-progress 23,672 22,303 Finished goods 49,907 56,900 $ 116,544 $ 132,476
Prepaid Expense and Other Current AssetsPrepaid expenses and other current assets consisted of the following (in thousands): March 31, December 31, 2019 2018 Government incentives receivable $ 960 $ 1,001 Prepaid expenses and other current assets 27,402 32,741 $ 28,362 $ 33,742
Property, Plant and Equipment, NetProperty, plant and equipment, net consisted of the following (in thousands): March 31, December 31, 2019 2018 Energy Servers $ 511,485 $ 511,485 Computers, software and hardware 18,796 16,536 Machinery and equipment 100,311 99,209 Furniture and fixtures 8,669 4,337 Leasehold improvements 34,126 18,629 Building 40,512 40,512 Construction in progress 10,496 29,084 724,395 719,792 Less: Accumulated depreciation (249,010 ) (238,378 ) $ 475,385 $ 481,414
Other Long-Term AssetsOther long-term assets consisted of the following (in thousands): March 31, December 31, 2019 2018 Prepaid and other long-term assets $ 26,321 $ 27,086 Equity-method investments 6,292 6,046 Long-term deposits 1,773 1,660 $ 34,386 $ 34,792
Accrued WarrantyAccrued warranty liabilities consisted of the following (in thousands): March 31, December 31, 2019 2018 Product warranty $ 9,183 $ 10,935 Operations and maintenance services agreements 7,553 8,301 $ 16,736 $ 19,236 Changes during the current period in the standard product warranty liability were as follows (in thousands): Balances at December 31, 2018 $ 10,935 Accrued warranty, net 629 Warranty expenditures during period (2,381 ) Balances at March 31, 2019 $ 9,183
Accrued Other Current LiabilitiesAccrued other current liabilities consisted of the following (in thousands): March 31, December 31, 2019 2018 Compensation and benefits $ 18,327 $ 16,742 Current portion of derivative liabilities 3,349 3,232 Managed services liabilities 4,633 5,091 Accrued installation 6,408 6,859 Sales tax liabilities 2,202 1,700 Interest payable 3,631 4,675 Other 29,416 31,236 $ 67,966 $ 69,535
Other Long-Term LiabilitiesAccrued other long-term liabilities consisted of the following (in thousands): March 31, December 31, 2019 2018 Delaware grant $ 10,469 $ 10,469 Managed services liabilities 29,062 29,741 Other 18,501 15,727 $ 58,032 $ 55,937
Customer Financing Leases, ReceivableThe components of investment in sales-type financing leases consisted of the following (in thousands): March 31, December 31, 2019 2018 Total minimum lease payments to be received $ 98,632 $ 100,816 Less: Amounts representing estimated executing costs (24,522 ) (25,180 ) Net present value of minimum lease payments to be received 74,110 75,636 Estimated residual value of leased assets 1,051 1,051 Less: Unearned income (3,824 ) (4,011 ) Net investment in sales-type financing leases 71,337 72,676 Less: Current portion (5,717 ) (5,594 ) Non-current portion of investment in sales-type financing leases $ 65,620 $ 67,082
Schedule of Customer Payments from Sales-Type Financing LeasesThe future scheduled customer payments from sales-type financing leases were as follows as of March 31, 2019 (in thousands): Remainder of 2019 2020 2021 2022 2023 Thereafter Future minimum lease payments, less interest $ 4,256 $ 6,022 $ 6,415 $ 6,853 $ 7,310 $ 39,430

Outstanding Loans and Securit_2

Outstanding Loans and Security Agreements (Tables)3 Months Ended
Mar. 31, 2019
Debt Disclosure [Abstract]
Schedule of debtThe following is a summary of our debt as of March 31, 2019 (in thousands): Unpaid Net Carrying Value Unused Current Long- Total LIBOR + 4% term loan due November 2020 $ 2,857 $ 1,683 $ 1,112 $ 2,795 $ — 5% convertible promissory note due December 2020 33,104 — 35,136 35,136 — 6% convertible promissory notes due December 2020 296,233 — 267,289 267,289 — 10% notes due July 2024 100,000 14,000 82,073 96,073 — Total recourse debt 432,194 15,683 385,610 401,293 — 5.22% senior secured term notes due March 2025 76,827 12,151 63,635 75,786 — 7.5% term loan due September 2028 39,759 2,341 33,417 35,758 — LIBOR + 5.25% term loan due October 2020 24,438 926 22,808 23,734 — 6.07% senior secured notes due March 2030 82,889 2,634 79,172 81,806 — LIBOR + 2.5% term loan due December 2021 124,593 3,775 118,926 122,701 — Letters of Credit due December 2021 — — — — 1,220 Total non-recourse debt 348,506 21,827 317,958 339,785 1,220 Total debt $ 780,700 $ 37,510 $ 703,568 $ 741,078 $ 1,220 The following is a summary of our debt as of December 31, 2018 (in thousands): Unpaid Principal Balance Net Carrying Value Unused Borrowing Capacity Current Long- Term Total LIBOR + 4% term loan due November 2020 $ 3,286 $ 1,686 $ 1,528 $ 3,214 $ — 5% convertible promissory notes due December 2020 33,104 — 34,706 34,706 — 6% convertible promissory notes due December 2020 296,233 — 263,284 263,284 — 10% notes due July 2024 100,000 7,000 88,555 95,555 — Total recourse debt 432,623 8,686 388,073 396,759 — 5.22% senior secured term notes due March 2025 79,698 11,994 66,572 78,566 — 7.5% term loan due September 2028 40,538 2,200 34,119 36,319 — LIBOR + 5.25% term loan due October 2020 24,723 827 23,089 23,916 — 6.07% senior secured notes due March 2030 83,457 2,469 79,868 82,337 — LIBOR + 2.5% term loan due December 2021 125,456 3,672 119,712 123,384 — Letters of Credit due December 2021 — — — — 1,220 Total non-recourse debt 353,872 21,162 323,360 344,522 1,220 Total debt $ 786,495 $ 29,848 $ 711,433 $ 741,281 $ 1,220
Schedule of repaymentThe following table presents our total outstanding debt's unpaid principal balance repayment schedule as of March 31, 2019 (in thousands): Remainder of 2019 $ 24,082 2020 391,442 2021 153,639 2022 40,059 2023 44,209 Thereafter 127,269 $ 780,700

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)3 Months Ended
Mar. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair Value DerivativesThe fair values of the derivatives related to interest rate swap agreements applied to two of our PPA companies designated as cash flow hedges as of March 31, 2019 and December 31, 2018 on our consolidated balance sheets were as follows (in thousands): March 31, December 31, 2019 2018 Assets Prepaid expenses and other current assets $ — $ 42 Other long-term assets 27 40 $ 27 $ 82 Liabilities Accrued other current liabilities $ 108 $ 4 Derivative liabilities 5,611 3,626 $ 5,719 $ 3,630
Schedule of Net Investment Hedges in Accumulated Other Comprehensive Income (Loss)The changes in fair value of the derivative contracts designated as cash flow hedges and the amounts recognized in accumulated other comprehensive income (loss) and in earnings for the three months ended March 31, 2019 and 2018 were as follows (in thousands): Three Months Ended March 31, 2019 March 31, 2018 Beginning balance $ 3,548 $ 5,853 Loss (gain) recognized in other comprehensive income (loss) 2,130 (2,640 ) Amounts reclassified from other comprehensive income (loss) to earnings 61 (212 ) Net loss (gain) recognized in other comprehensive income (loss) 2,191 (2,852 ) Gain recognized in earnings (47 ) (92 ) Ending balance $ 5,692 $ 2,909

Net Loss per Share Attributab_2

Net Loss per Share Attributable to Common Stockholders (Tables)3 Months Ended
Mar. 31, 2019
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and DilutedThe following table sets forth the computation of the Company's net loss per share (basic) and net loss per share (diluted) attributable to common stockholders (in thousands, except per share amounts): Three Months Ended 2019 2018 Numerator: Net loss attributable to Class A and Class B common stockholders $ (84,441 ) $ (17,716 ) Denominator: Weighted average shares used to compute net loss per share attributable to Class A and Class B common stockholders, basic and diluted 111,842 10,403 Net loss per share attributable to Class A and Class B common stockholders, basic and diluted $ (0.76 ) $ (1.70 )
Schedule of Antidilutive Securities Excluded from Computation of Diluted Net Loss Per ShareThe following common stock equivalents (in thousands) were excluded from the computation of net loss per share attributable to common shareholders (diluted) for the periods presented as their inclusion would have been antidilutive: Three Months Ended 2019 2018 Convertible and non-convertible redeemable preferred stock and convertible notes 27,241 85,708 Stock options to purchase common stock 5,190 3,177 Convertible redeemable preferred stock warrants — 60 Convertible redeemable common stock warrants — 312 32,431 89,257

Stock-Based Compensation and _2

Stock-Based Compensation and Employee Benefit Plan (Tables)3 Months Ended
Mar. 31, 2019
Compensation Related Costs [Abstract]
Stock Option and RSU ActivityThe following table summarizes the stock option activity under our stock plans during the reporting period: Outstanding Options Number of Weighted Remaining Aggregate (in thousands) Balances at December 31, 2018 14,558,420 $ 25.93 6.78 $ 3,084 Granted 743,705 11.38 Exercised (136,382 ) 4.23 Cancelled (111,693 ) 25.44 Balances at March 31, 2019 15,054,050 25.41 6.62 4,686 Vested and expected to vest at March 31, 2019 14,690,193 25.56 6.56 4,645 Exercisable at March 31, 2019 8,555,962 28.18 4.97 3,586
RSU Activity and Related InformationA summary of our RSUs activity and related information is as follows: Number of Awards Outstanding Weighted Average Grant Date Fair Value Unvested Balance at December 31, 2018 16,784,800 $ 18.74 Granted 2,525,755 12.43 Vested (2,960,462 ) 20.17 Forfeited (101,577 ) 16.44 Unvested Balance at March 31, 2019 16,248,516 17.52
Weighted-Average Valuation AssumptionsWe used the following weighted-average assumptions in applying the Black-Scholes valuation model: Three Months Ended 2019 2018 Risk-free interest rate 2.60% - 2.64% 2.49% Expected term (years) 6.3 - 6.6 6.2 - 6.5 Expected dividend yield — — Expected volatility 50.20% 55.10%
Employee and Non-Employee Stock-Based Compensation ExpenseThe following table summarizes the components of stock-based compensation expense in the consolidated statements of operations (in thousands): Three Months Ended 2019 2018 Cost of revenue $ 14,372 $ 1,898 Research and development 14,230 1,638 Sales and marketing 11,512 952 General and administrative 23,768 3,468 Total stock-based compensation $ 63,882 $ 7,956

Power Purchase Agreement Prog_2

Power Purchase Agreement Programs (Tables)3 Months Ended
Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Variable Interest EntitiesThe table below shows the details of the five continuing Investment Companies and their cumulative activities from inception to the periods indicated (dollars in thousands): PPA Company II PPA Company IIIa PPA Company IIIb PPA Company IV PPA Company V Overview: Maximum size of installation (in megawatts) 30 10 6 21 40 Installed size (in megawatts) 30 10 5 19 37 Term of power purchase agreements (years) 21 15 15 15 15 First system installed Jun-12 Feb-13 Aug-13 Sep-14 Jun-15 Last system installed Nov-13 Jun-14 Jun-15 Mar-16 Dec-16 Income (loss) and tax benefits allocation to Equity Investor 99% 99% 99% 90% 99% Cash allocation to Equity Investor 99% 99% 99% 90% 90% Income (loss), tax and cash allocations to Equity Investor after the flip date 5% 5% 5% No flip No flip Equity Investor ¹ Credit Suisse US Bank US Bank Exelon Corporation Exelon Corporation Put option date ² 10th anniversary of initial funding date 1st anniversary of flip point 1st anniversary of flip point N/A N/A Company cash contributions $ 22,442 $ 32,223 $ 22,658 $ 11,669 $ 27,932 Company non-cash contributions ³ $ — $ 8,655 $ 2,082 $ — $ — Equity Investor cash contributions $ 139,993 $ 36,967 $ 20,152 $ 84,782 $ 227,344 Debt financing $ 144,813 $ 44,968 $ 28,676 $ 99,000 $ 131,237 Cumulative Activity as of March 31, 2019: Distributions to Equity Investor $ 116,942 $ 4,246 $ 1,907 $ 4,982 $ 68,944 Debt repayment—principal $ 67,985 $ 5,209 $ 4,238 $ 16,111 $ 6,644 Cumulative Activity as of December 31, 2018: Distributions to Equity Investor $ 116,942 $ 4,063 $ 1,807 $ 4,568 $ 66,745 Debt repayment—principal $ 65,114 $ 4,431 $ 3,953 $ 15,543 $ 5,780 ¹ Investor name represents ultimate parent of subsidiary financing the project. ² Investor right on the certain date, upon giving us advance written notice, to sell the membership interests to us or resign or withdraw from the investment partnership. ³ Non-cash contributions consisted of warrants that were issued by us to respective lenders to each PPA Entity, as required by such entity’s credit agreements. The corresponding values are amortized using the effective interest method over the debt term. The following table shows Bloom Energy's stand-alone, the PPA Entities combined and these consolidated balances as of March 31, 2019 , and December 31, 2018 (in thousands): March 31, 2019 December 31, 2018 Bloom PPA Entities Consolidated Bloom PPA Entities Consolidated Assets Current assets $ 609,411 $ 30,431 $ 639,842 $ 646,350 $ 26,231 $ 672,581 Long-term assets 191,802 487,206 679,008 220,399 496,688 717,087 Total assets $ 801,213 $ 517,637 $ 1,318,850 $ 866,749 $ 522,919 $ 1,389,668 Liabilities Current liabilities $ 236,372 $ 2,312 $ 238,684 $ 246,866 $ 2,952 $ 249,818 Current portion of debt 15,683 21,827 37,510 8,686 21,162 29,848 Long-term liabilities 255,010 16,051 271,061 293,739 14,120 307,859 Long-term portion of debt 385,610 317,958 703,568 388,073 323,360 711,433 Total liabilities $ 892,675 $ 358,148 $ 1,250,823 $ 937,364 $ 361,594 $ 1,298,958 The aggregate carrying values of the PPA Entities’ assets and liabilities in the consolidated balance sheets, after eliminations of intercompany transactions and balances, were as follows (in thousands): March 31, December 31, 2019 2018 Assets Current assets: Cash and cash equivalents $ 9,071 $ 5,295 Restricted cash 5,040 2,917 Accounts receivable 7,431 7,516 Customer financing receivable 5,717 5,594 Prepaid expenses and other current assets 3,172 4,909 Total current assets 30,431 26,231 Property and equipment, net 391,121 399,060 Customer financing receivable, non-current 65,620 67,082 Restricted cash 27,851 27,854 Other long-term assets 2,614 2,692 Total assets $ 517,637 $ 522,919 Liabilities Current liabilities: Accounts payable $ 426 $ 724 Accrued other current liabilities 1,100 1,442 Deferred revenue and customer deposits 786 786 Current portion of debt 21,827 21,162 Total current liabilities 24,139 24,114 Derivative liabilities, net of current portion 5,611 3,626 Deferred revenue, net of current portion 8,502 8,696 Long-term portion of debt 317,958 323,360 Other long-term liabilities 1,938 1,798 Total liabilities $ 358,148 $ 361,594

Commitments and Contingencies (

Commitments and Contingencies (Tables)3 Months Ended
Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Schedule of Future Minimum Rental Payments for Operating LeasesAt March 31, 2019 , future minimum lease payments under operating leases were as follows (in thousands): Remainder of 2019 $ 13,491 2020 18,785 2021 16,169 2022 15,673 2023 15,335 Thereafter 57,310 $ 136,763

Related Party Transactions (Tab

Related Party Transactions (Tables)3 Months Ended
Mar. 31, 2019
Related Party Transactions [Abstract]
Schedule of Related Party TransactionsOur results of operations included the following related party transactions (in thousands): Three Months Ended 2019 2018 Total revenue from related parties $ 813 $ 29,269 Consulting expenses paid to related parties (included in general and administrative expense) 50 51 Interest expense on debt to related parties 1,612 2,627 The following is a summary of our debt and convertible notes from investors considered to be related parties as of March 31, 2019 (in thousands): Unpaid Net Carrying Value Current Long- Total Recourse debt from related parties: 6% convertible promissory notes due December 2020 from related parties $ 27,734 $ — $ 27,734 $ 27,734 Non-recourse debt from related parties: 7.5% term loan due September 2028 from related parties 39,759 2,341 33,417 35,758 Total debt from related parties $ 67,493 $ 2,341 $ 61,151 $ 63,492 The following is a summary of our debt and convertible notes from investors considered to be related parties as of December 31, 2018 (in thousands): Unpaid Net Carrying Value Current Long- Total Recourse debt from related parties: 6% convertible promissory notes due December 2020 from related parties $ 27,734 $ — $ 27,734 $ 27,734 Non-recourse debt from related parties: 7.5% term loan due September 2028 from related parties 40,538 2,200 34,119 36,319 Total debt from related parties $ 68,272 $ 2,200 $ 61,853 $ 64,053

Nature of Business and Liquid_2

Nature of Business and Liquidity - Liquidity (Additional Information) (Details) - IPO $ / shares in Units, $ in Millions1 Months Ended
Jul. 31, 2018USD ($)$ / sharesshares
Subsidiary, Sale of Stock [Line Items]
Shares sold in offering (in shares) | shares20,700,000
Offering price per share (in dollars per share) | $ / shares $ 15
Net proceeds from stock offering | $ $ 282.3

Basis of Presentation and Sig_3

Basis of Presentation and Significant Accounting Policies - Concentration of Risk (Details)3 Months Ended12 Months Ended
Mar. 31, 2019Mar. 31, 2018Dec. 31, 2018
Accounts Receivable | Customer Concentration Risk | Customer One
Concentration Risk [Line Items]
Concentration risk, percentage58.00%66.80%
Accounts Receivable | Customer Concentration Risk | Customer Two
Concentration Risk [Line Items]
Concentration risk, percentage12.10%
Sales Revenue, Net | Geographic Concentration Risk | Customer One
Concentration Risk [Line Items]
Concentration risk, percentage24.00%17.30%
Sales Revenue, Net | Customer Concentration Risk | Customer One
Concentration Risk [Line Items]
Concentration risk, percentage24.00%
Sales Revenue, Net | Customer Concentration Risk | Customer Two
Concentration Risk [Line Items]
Concentration risk, percentage25.00%53.00%
Sales Revenue, Net | Customer Concentration Risk | Customer Three
Concentration Risk [Line Items]
Concentration risk, percentage23.00%
Sales Revenue, Net | Customer Concentration Risk | Customer Four
Concentration Risk [Line Items]
Concentration risk, percentage17.00%

Financial Instruments - Cash an

Financial Instruments - Cash and Cash Equivalents and Restricted Cash (Details) - USD ($) $ in ThousandsMar. 31, 2019Dec. 31, 2018Mar. 31, 2018Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Cash and cash equivalents[1] $ 320,414 $ 220,728
Cash, cash equivalents and restricted cash369,934 280,485 $ 143,592 $ 180,612
Amortized Cost
Debt Securities, Available-for-sale [Line Items]
Cash and cash equivalents320,414
Restricted cash49,520
Cash, cash equivalents and restricted cash369,934
Amortized Cost | Cash
Debt Securities, Available-for-sale [Line Items]
Cash, cash equivalents and restricted cash152,676
Amortized Cost | Money market funds
Debt Securities, Available-for-sale [Line Items]
Cash, cash equivalents and restricted cash $ 217,258
Fair Value
Debt Securities, Available-for-sale [Line Items]
Cash and cash equivalents220,728
Restricted cash59,757
Cash, cash equivalents and restricted cash280,485
Fair Value | Cash
Debt Securities, Available-for-sale [Line Items]
Cash, cash equivalents and restricted cash136,642
Fair Value | Money market funds
Debt Securities, Available-for-sale [Line Items]
Cash, cash equivalents and restricted cash $ 143,843
[1]We have variable interest entities which represent a portion of the consolidated balances are recorded within the "Cash and cash equivalents," "Restricted cash," "Accounts receivable," "Customer financing receivable," "Prepaid expenses and other current assets," "Property and equipment, net," "Customer financing receivable, non-current," "Restricted cash, non-current," "Other long-term assets," "Accounts payable," "Accrued other current liabilities," "Deferred revenue and customer deposits," "Current portion of non-recourse debt from related parties," "Derivative liabilities, net of current portion," "Deferred revenue and customer deposits, net of current portion," "Long-term portion of non-recourse debt," and "Other long-term liabilities" financial statement line items in the Condensed Consolidated Balance Sheets (see Note 12).

Financial Instruments - Restric

Financial Instruments - Restricted Cash (Details) - USD ($) $ in ThousandsMar. 31, 2019Dec. 31, 2018
Variable Interest Entity [Line Items]
Restricted cash, current[1] $ 18,419 $ 28,657
Restricted cash, non-current[1]31,101 31,100
Total restricted cash49,520 59,757
Consolidated Entity, Excluding VIEs
Variable Interest Entity [Line Items]
Restricted cash, current13,379 25,740
Restricted cash, non-current3,250 3,246
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Restricted cash, current5,040 2,917
Restricted cash, non-current $ 27,851 $ 27,854
[1]We have variable interest entities which represent a portion of the consolidated balances are recorded within the "Cash and cash equivalents," "Restricted cash," "Accounts receivable," "Customer financing receivable," "Prepaid expenses and other current assets," "Property and equipment, net," "Customer financing receivable, non-current," "Restricted cash, non-current," "Other long-term assets," "Accounts payable," "Accrued other current liabilities," "Deferred revenue and customer deposits," "Current portion of non-recourse debt from related parties," "Derivative liabilities, net of current portion," "Deferred revenue and customer deposits, net of current portion," "Long-term portion of non-recourse debt," and "Other long-term liabilities" financial statement line items in the Condensed Consolidated Balance Sheets (see Note 12).

Financial Instruments - Short-T

Financial Instruments - Short-Term Investments (Details) - USD ($) $ in ThousandsMar. 31, 2019Dec. 31, 2018
Cash and Cash Equivalents [Abstract]
Short-term investments $ 0 $ 104,350

Fair Value - Financial Assets a

Fair Value - Financial Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in ThousandsMar. 31, 2019Dec. 31, 2018
Assets
Total assets $ 217,285 $ 248,275
Liabilities
Accrued other current liabilities1,723 1,331
Total liabilities16,238 14,690
Money market funds
Assets
Cash equivalents:217,258 143,843
Short-term investments
Assets
Short-term investments104,350
Natural gas fixed price forward contracts
Liabilities
Derivatives:8,796 9,729
Interest rate swap agreements
Assets
Interest rate swap agreements27 82
Liabilities
Derivatives:5,719 3,630
Level 1
Assets
Total assets217,258 248,193
Liabilities
Accrued other current liabilities1,723 1,331
Total liabilities1,723 1,331
Level 1 | Money market funds
Assets
Cash equivalents:217,258 143,843
Level 1 | Short-term investments
Assets
Short-term investments104,350
Level 1 | Natural gas fixed price forward contracts
Liabilities
Derivatives:0 0
Level 1 | Interest rate swap agreements
Assets
Interest rate swap agreements0 0
Liabilities
Derivatives:0 0
Level 2
Assets
Total assets27 82
Liabilities
Accrued other current liabilities0 0
Total liabilities5,719 3,630
Level 2 | Money market funds
Assets
Cash equivalents:0 0
Level 2 | Short-term investments
Assets
Short-term investments0
Level 2 | Natural gas fixed price forward contracts
Liabilities
Derivatives:0 0
Level 2 | Interest rate swap agreements
Assets
Interest rate swap agreements27 82
Liabilities
Derivatives:5,719 3,630
Level 3
Assets
Total assets0 0
Liabilities
Accrued other current liabilities0 0
Total liabilities8,796 9,729
Level 3 | Money market funds
Assets
Cash equivalents:0 0
Level 3 | Short-term investments
Assets
Short-term investments0
Level 3 | Natural gas fixed price forward contracts
Liabilities
Derivatives:8,796 9,729
Level 3 | Interest rate swap agreements
Assets
Interest rate swap agreements0 0
Liabilities
Derivatives: $ 0 $ 0

Fair Value - Natural Gas Deriva

Fair Value - Natural Gas Derivatives (Details) - Not designated as hedging instrument - Natural gas forward contract MMBTU in Thousands, $ in Thousands3 Months Ended12 Months Ended
Mar. 31, 2019USD ($)MMBTUDec. 31, 2018USD ($)MMBTU
Derivatives, Fair Value [Line Items]
Number of Contracts (MMBTU) | MMBTU2,873 3,096
Derivative liability | $ $ 8,796 $ 9,729

Fair Value - Additional Informa

Fair Value - Additional Information (Details) - USD ($)3 Months Ended
Mar. 31, 2019Mar. 31, 2018Jan. 31, 2018Jun. 30, 2017Sep. 30, 2016Sep. 10, 2016Jan. 29, 2016Dec. 15, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash flow hedge gain to be reclassified within 12 months $ 100,000
Not designated as hedging instrument | Natural gas forward contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain (loss) on derivative400,000 $ (900,000)
Gain on the settlement of contracts $ 500,000 $ 1,100,000
Convertible promissory notes | Convertible Promissory Notes due December 2020, Recourse
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt face amount $ 75,000,000 $ 25,000,000 $ 160,000,000
Interest rate percentage6.00%6.00%
Convertible stock price (in dollars per share) $ 20.61 $ 11.25
Embedded derivative liability $ 177,200,000
Affiliated entity | Convertible promissory notes | Convertible Promissory Notes due December 2020, Recourse
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt face amount $ 260,000,000
Interest rate percentage6.00%6.00%5.00%

Fair Value - Change in Level 3

Fair Value - Change in Level 3 Financial Assets (Details) - USD ($) $ in Thousands3 Months Ended
Mar. 31, 2019Mar. 31, 2018
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance $ 9,729 $ 165,964
Settlement of natural gas fixed price forward contracts(527)(1,102)
Changes in fair value(406)7,316
Balance8,796 172,178
Natural gas fixed price forward contract
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance9,729 15,368
Settlement of natural gas fixed price forward contracts(527)(1,102)
Changes in fair value(406)855
Balance8,796 15,121
Preferred stock warrants
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance0 9,825
Changes in fair value0 (3,271)
Balance0 6,554
Embedded Derivative Liability
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance0 140,771
Changes in fair value0 9,732
Balance $ 0 $ 150,503

Fair Value - Estimated Fair Val

Fair Value - Estimated Fair Values and Carrying Values for Customer Receivables and Debt Instruments (Details) - USD ($) $ in ThousandsMar. 31, 2019Dec. 31, 2018
Notes due July 2024, Recourse
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate percentage10.00%
Senior secured notes | Senior Secured Notes due March 2025, Non-Recourse | Net Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument $ 75,786 $ 78,566
Senior secured notes | Senior Secured Notes due March 2025, Non-Recourse | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument79,341 80,838
Senior secured notes | Senior Secured Notes due March 2030, Non-Recourse | Net Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument81,806 82,337
Senior secured notes | Senior Secured Notes due March 2030, Non-Recourse | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument88,715 85,917
Term loan | Term Loan due November 2020, Recourse | Net Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument2,795 3,214
Term loan | Term Loan due November 2020, Recourse | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument2,914 3,311
Term loan | Term Loan due September 2028, Non-Recourse | Net Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument35,758 36,319
Term loan | Term Loan due September 2028, Non-Recourse | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument41,759 39,892
Term loan | Senior Secured Notes due October 2020, Non-Recourse | Net Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument23,734 23,916
Term loan | Senior Secured Notes due October 2020, Non-Recourse | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument25,679 25,441
Term loan | Term Loan due December 2021, Non-Recourse | Net Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument122,701 123,384
Term loan | Term Loan due December 2021, Non-Recourse | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument $ 125,770 123,040
Convertible promissory notes | Convertible Promissory Notes due December 2019 and 2020, Recourse | Net Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate percentage5.00%
Debt Instrument $ 35,136 34,706
Convertible promissory notes | Convertible Promissory Notes due December 2019 and 2020, Recourse | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument33,832 31,546
Convertible promissory notes | Convertible Promissory Notes One due December 2020 | Net Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument267,289 263,284
Convertible promissory notes | Convertible Promissory Notes One due December 2020 | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument418,999 353,368
Notes | Notes due July 2024, Recourse | Net Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument96,073 95,555
Notes | Notes due July 2024, Recourse | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument99,598 99,260
Customer financing receivables | Net Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Customer financing receivables71,337 72,676
Customer financing receivables | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Customer financing receivables $ 51,312 $ 51,541
Affiliated entity | Term Loan due November 2020, Recourse
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate percentage4.00%
Affiliated entity | Senior Secured Notes due October 2020, Non-Recourse
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate percentage5.25%
Affiliated entity | Term Loan due December 2021, Non-Recourse
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate percentage2.50%
Affiliated entity | Convertible promissory notes | Convertible Promissory Notes due December 2019 and 2020, Recourse | Net Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate percentage6.00%
PPA Company II | Senior secured notes | Senior Secured Notes due March 2025, Non-Recourse
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate percentage5.22%
PPA Company IIIa | Term loan | Term Loan due September 2028, Non-Recourse
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate percentage7.50%
PPA Company IV | Senior secured notes | Senior Secured Notes due March 2030, Non-Recourse
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate percentage6.07%

Balance Sheet Components - Inve

Balance Sheet Components - Inventories, Net (Details) - USD ($) $ in ThousandsMar. 31, 2019Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Raw materials $ 42,965 $ 53,273
Work-in-progress23,672 22,303
Finished goods49,907 56,900
Inventory, net $ 116,544 $ 132,476

Balance Sheet Components - Prep

Balance Sheet Components - Prepaid Expense and Other Current Assets (Details) - USD ($) $ in ThousandsMar. 31, 2019Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Government incentives receivable $ 960 $ 1,001
Prepaid expenses and other current assets27,402 32,741
Total[1] $ 28,362 $ 33,742
[1]We have variable interest entities which represent a portion of the consolidated balances are recorded within the "Cash and cash equivalents," "Restricted cash," "Accounts receivable," "Customer financing receivable," "Prepaid expenses and other current assets," "Property and equipment, net," "Customer financing receivable, non-current," "Restricted cash, non-current," "Other long-term assets," "Accounts payable," "Accrued other current liabilities," "Deferred revenue and customer deposits," "Current portion of non-recourse debt from related parties," "Derivative liabilities, net of current portion," "Deferred revenue and customer deposits, net of current portion," "Long-term portion of non-recourse debt," and "Other long-term liabilities" financial statement line items in the Condensed Consolidated Balance Sheets (see Note 12).

Balance Sheet Components - Prop

Balance Sheet Components - Property, Plant and Equipment (Details) - USD ($) $ in ThousandsMar. 31, 2019Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross $ 724,395 $ 719,792
Less: Accumulated depreciation(249,010)(238,378)
Property, plant and equipment, net[1]475,385 481,414
Energy Servers
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross511,485 511,485
Computers, software and hardware
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross18,796 16,536
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross100,311 99,209
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross8,669 4,337
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross34,126 18,629
Building
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross40,512 40,512
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross $ 10,496 $ 29,084
[1]We have variable interest entities which represent a portion of the consolidated balances are recorded within the "Cash and cash equivalents," "Restricted cash," "Accounts receivable," "Customer financing receivable," "Prepaid expenses and other current assets," "Property and equipment, net," "Customer financing receivable, non-current," "Restricted cash, non-current," "Other long-term assets," "Accounts payable," "Accrued other current liabilities," "Deferred revenue and customer deposits," "Current portion of non-recourse debt from related parties," "Derivative liabilities, net of current portion," "Deferred revenue and customer deposits, net of current portion," "Long-term portion of non-recourse debt," and "Other long-term liabilities" financial statement line items in the Condensed Consolidated Balance Sheets (see Note 12).

Balance Sheet Components - Pr_2

Balance Sheet Components - Property Plant and Equipment, Net (Additional Information) (Details) - USD ($) $ in Thousands3 Months Ended
Mar. 31, 2019Mar. 31, 2018Dec. 31, 2018
Property Subject to or Available for Operating Lease [Line Items]
Depreciation and Amortization $ 11,271 $ 10,847
Property subject to operating lease
Property Subject to or Available for Operating Lease [Line Items]
Property, plant and equipment397,500 $ 397,500
Accumulated depreciation83,800 $ 77,400
Construction in progress
Property Subject to or Available for Operating Lease [Line Items]
Decrease in property plant and equipment18,600
Property, Plant and Equipment
Property Subject to or Available for Operating Lease [Line Items]
Depreciation and Amortization $ 6,400 $ 6,400

Balance Sheet Components - Cust

Balance Sheet Components - Customer Financing Leases Receivable (Details) - USD ($) $ in ThousandsMar. 31, 2019Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Total minimum lease payments to be received $ 98,632 $ 100,816
Less: Amounts representing estimated executing costs(24,522)(25,180)
Net present value of minimum lease payments to be received74,110 75,636
Estimated residual value of leased assets1,051 1,051
Less: Unearned income(3,824)(4,011)
Net investment in sales-type financing leases71,337 72,676
Less: Current portion[1](5,717)(5,594)
Non-current portion of investment in sales-type financing leases[1] $ 65,620 $ 67,082
[1]We have variable interest entities which represent a portion of the consolidated balances are recorded within the "Cash and cash equivalents," "Restricted cash," "Accounts receivable," "Customer financing receivable," "Prepaid expenses and other current assets," "Property and equipment, net," "Customer financing receivable, non-current," "Restricted cash, non-current," "Other long-term assets," "Accounts payable," "Accrued other current liabilities," "Deferred revenue and customer deposits," "Current portion of non-recourse debt from related parties," "Derivative liabilities, net of current portion," "Deferred revenue and customer deposits, net of current portion," "Long-term portion of non-recourse debt," and "Other long-term liabilities" financial statement line items in the Condensed Consolidated Balance Sheets (see Note 12).

Balance Sheet Components - Futu

Balance Sheet Components - Future Scheduled Customer Payments (Details) $ in ThousandsMar. 31, 2019USD ($)
Capital Leases, Future Minimum Payments Receivable, Fiscal Year Maturity [Abstract]
Remainder of 2019 $ 4,256
20206,022
20216,415
20226,853
20237,310
Thereafter $ 39,430

Balance Sheet Components - Othe

Balance Sheet Components - Other Long-Term Assets (Details) - USD ($) $ in ThousandsMar. 31, 2019Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Prepaid and other long-term assets $ 26,321 $ 27,086
Equity-method investments6,292 6,046
Long-term deposits1,773 1,660
Other long-term assets[1] $ 34,386 $ 34,792
[1]We have variable interest entities which represent a portion of the consolidated balances are recorded within the "Cash and cash equivalents," "Restricted cash," "Accounts receivable," "Customer financing receivable," "Prepaid expenses and other current assets," "Property and equipment, net," "Customer financing receivable, non-current," "Restricted cash, non-current," "Other long-term assets," "Accounts payable," "Accrued other current liabilities," "Deferred revenue and customer deposits," "Current portion of non-recourse debt from related parties," "Derivative liabilities, net of current portion," "Deferred revenue and customer deposits, net of current portion," "Long-term portion of non-recourse debt," and "Other long-term liabilities" financial statement line items in the Condensed Consolidated Balance Sheets (see Note 12).

Balance Sheet Components - Equi

Balance Sheet Components - Equity-method investments (Additional Information) (Details) - USD ($) $ in MillionsMar. 31, 2019Dec. 31, 2018
Softbank Corp.
Variable Interest Entity [Line Items]
Accounts receivable $ 2.7 $ 2.4

Balance Sheet Components - Accr

Balance Sheet Components - Accrued Warranty (Details) - USD ($) $ in ThousandsMar. 31, 2019Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Product warranty $ 9,183 $ 10,935
Operations and maintenance services agreements7,553 8,301
Standard and Extended Product Warranty Accrual $ 16,736 $ 19,236

Balance Sheet Components - Stan

Balance Sheet Components - Standard Product Warranty Liability (Details) $ in Thousands3 Months Ended
Mar. 31, 2019USD ($)
Movement in Standard Product Warranty Accrual [Roll Forward]
Accrued warranty balance $ 10,935
Accrued warranty, net629
Warranty expenditures during period(2,381)
Accrued warranty balance $ 9,183

Balance Sheet Components - Ac_2

Balance Sheet Components - Accrued Other Current Liabilities (Details) - USD ($) $ in ThousandsMar. 31, 2019Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Compensation and benefits $ 18,327 $ 16,742
Current portion of derivative liabilities3,349 3,232
Managed services liabilities4,633 5,091
Accrued installation6,408 6,859
Sales tax liabilities2,202 1,700
Interest payable3,631 4,675
Other29,416 31,236
Accrued other current liabilities[1] $ 67,966 $ 69,535
[1]We have variable interest entities which represent a portion of the consolidated balances are recorded within the "Cash and cash equivalents," "Restricted cash," "Accounts receivable," "Customer financing receivable," "Prepaid expenses and other current assets," "Property and equipment, net," "Customer financing receivable, non-current," "Restricted cash, non-current," "Other long-term assets," "Accounts payable," "Accrued other current liabilities," "Deferred revenue and customer deposits," "Current portion of non-recourse debt from related parties," "Derivative liabilities, net of current portion," "Deferred revenue and customer deposits, net of current portion," "Long-term portion of non-recourse debt," and "Other long-term liabilities" financial statement line items in the Condensed Consolidated Balance Sheets (see Note 12).

Balance Sheet Components - Ot_2

Balance Sheet Components - Other Long-Term Liabilities (Details) - USD ($) $ in ThousandsMar. 31, 2019Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Delaware grant $ 10,469 $ 10,469
Managed services liabilities29,062 29,741
Other18,501 15,727
Other long-term liabilities[1] $ 58,032 $ 55,937
[1]We have variable interest entities which represent a portion of the consolidated balances are recorded within the "Cash and cash equivalents," "Restricted cash," "Accounts receivable," "Customer financing receivable," "Prepaid expenses and other current assets," "Property and equipment, net," "Customer financing receivable, non-current," "Restricted cash, non-current," "Other long-term assets," "Accounts payable," "Accrued other current liabilities," "Deferred revenue and customer deposits," "Current portion of non-recourse debt from related parties," "Derivative liabilities, net of current portion," "Deferred revenue and customer deposits, net of current portion," "Long-term portion of non-recourse debt," and "Other long-term liabilities" financial statement line items in the Condensed Consolidated Balance Sheets (see Note 12).

Balance Sheet Components - Ot_3

Balance Sheet Components - Other Long-Term Liabilities (Additional Information) (Details) - USD ($) $ in ThousandsMar. 31, 2019Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Managed services liabilities $ 29,062 $ 29,741

Outstanding Loans and Securit_3

Outstanding Loans and Security Agreements - Schedule of Debt (Details) - USD ($) $ in ThousandsMar. 31, 2019Dec. 31, 2018Jun. 30, 2017
Debt Instrument [Line Items]
Unpaid principal balance $ 780,700 $ 786,495
Current portion of debt37,510 29,848
Long-term portion of debt703,568 711,433
Total741,078 741,281
Unused Borrowing Capacity1,220 1,220
Senior secured notes | Senior Secured Notes due March 2025, Non-Recourse
Debt Instrument [Line Items]
Unpaid principal balance76,827 79,698
Current portion of debt12,151 11,994
Long-term portion of debt63,635 66,572
Total $ 75,786 78,566
Interest rate percentage5.22%
Term loan | Term Loan due September 2028, Non-Recourse
Debt Instrument [Line Items]
Unpaid principal balance $ 39,759 40,538
Current portion of debt2,341 2,200
Long-term portion of debt33,417 34,119
Total $ 35,758 36,319
Interest rate percentage7.50%
Term loan | Senior Secured Notes due October 2020, Non-Recourse
Debt Instrument [Line Items]
Unpaid principal balance $ 24,438 24,723
Current portion of debt926 827
Long-term portion of debt22,808 23,089
Total $ 23,734 23,916
Interest rate percentage5.25%
Term loan | Term Loan due December 2021, Non-Recourse
Debt Instrument [Line Items]
Unpaid principal balance $ 124,593 125,456
Current portion of debt3,775 3,672
Long-term portion of debt118,926 119,712
Total $ 122,701 123,384
Interest rate percentage2.50%
Term loan | Term Loan due November 2020, Recourse
Debt Instrument [Line Items]
Unpaid principal balance $ 2,857 3,286
Current portion of debt1,683 1,686
Long-term portion of debt1,112 1,528
Total $ 2,795 3,214
Interest rate percentage4.00%
Non-recourse debt
Debt Instrument [Line Items]
Unpaid principal balance $ 348,506 353,872
Current portion of debt21,827 21,162
Long-term portion of debt317,958 323,360
Total339,785 344,522
Unused Borrowing Capacity1,220 1,220
Convertible promissory notes | Convertible Promissory Notes Interest Rate 5% Due December 2020, Recourse
Debt Instrument [Line Items]
Unpaid principal balance33,104 33,104
Current portion of debt0 0
Long-term portion of debt35,136 34,706
Total $ 35,136 34,706
Interest rate percentage5.00%
Convertible promissory notes | Convertible Promissory Notes Interest Rate 6% Due December 2020, Recourse
Debt Instrument [Line Items]
Unpaid principal balance $ 296,233 290,400
Current portion of debt0 0
Long-term portion of debt267,289 263,284
Total $ 267,289 263,284
Interest rate percentage6.00%
Notes | Notes due July 2024, Recourse
Debt Instrument [Line Items]
Unpaid principal balance $ 100,000 100,000
Current portion of debt14,000 7,000
Long-term portion of debt82,073 88,555
Total $ 96,073 95,555
Interest rate percentage10.00%10.00%
Recourse debt
Debt Instrument [Line Items]
Unpaid principal balance $ 432,194 432,623
Current portion of debt15,683 8,686
Long-term portion of debt385,610 388,073
Total401,293 396,759
Senior Secured Notes due March 2030, Non-Recourse
Debt Instrument [Line Items]
Unpaid principal balance82,889 83,457
Current portion of debt2,634 2,469
Long-term portion of debt79,172 79,868
Total $ 81,806 82,337
Interest rate percentage6.07%
Letters of Credit | Letter of Credit due December 2021, Non-Recourse
Debt Instrument [Line Items]
Unused Borrowing Capacity $ 1,220 1,220
Variable Interest Entity, Primary Beneficiary
Debt Instrument [Line Items]
Current portion of debt21,827 21,162
Long-term portion of debt $ 317,958 $ 323,360

Outstanding Loans and Securit_4

Outstanding Loans and Security Agreements - Recourse Debt Facilities (Additional Information) (Details)May 31, 2013USD ($)Jul. 31, 2018USD ($)sharesMar. 31, 2019USD ($)day$ / sharessharesJun. 30, 2016USD ($)Dec. 31, 2018USD ($)Jan. 31, 2018Jan. 18, 2018Aug. 31, 2017sharesJun. 30, 2017USD ($)agreementDec. 31, 2016USD ($)Sep. 30, 2016USD ($)Sep. 10, 2016USD ($)Jan. 29, 2016USD ($)Dec. 15, 2015USD ($)$ / sharesDec. 31, 2014
Debt Instrument [Line Items]
Long-term debt carrying value $ 741,078,000 $ 741,281,000
Unpaid principal balance780,700,000 786,495,000
Long-term portion of debt703,568,000 711,433,000
Indebtedness in excess of $ 300,000
Issuance of common stock upon exercise of warrants (in shares) | shares312,575
Credit facility | Term Loan due November 2020, Recourse
Debt Instrument [Line Items]
Debt face amount $ 5,000,000 $ 5,000,000
Term loan | Term Loan due December 2021, Non-Recourse
Debt Instrument [Line Items]
Long-term debt carrying value $ 122,701,000 123,384,000
Interest rate percentage2.50%
Unpaid principal balance $ 124,593,000 125,456,000
Long-term portion of debt $ 118,926,000 $ 119,712,000
Term loan | Term Loan due November 2020, Recourse
Debt Instrument [Line Items]
Debt face amount $ 12,000,000
Debt term90 months
Weighted average interest rate (as a percentage)6.50%5.90%
Long-term debt carrying value $ 2,795,000 $ 3,214,000
Interest rate percentage4.00%
Unpaid principal balance $ 2,857,000 3,286,000
Long-term portion of debt1,112,000 1,528,000
Indebtedness in excess of $ 100,000
Convertible promissory notes | Convertible Promissory Notes due December 2019 and 2020, Recourse
Debt Instrument [Line Items]
Interest rate percentage5.00%
Unpaid principal balance $ 221,600,000
Convertible promissory notes | Convertible Promissory Notes Interest Rate 5% Due December 2020, Recourse
Debt Instrument [Line Items]
Long-term debt carrying value $ 35,136,000 34,706,000
Interest rate percentage5.00%
Unpaid principal balance $ 33,104,000 33,104,000
Long-term portion of debt $ 35,136,000 34,706,000
Convertible promissory notes | Convertible Promissory Notes Interest Rate 8% Due December 2018
Debt Instrument [Line Items]
Debt term3 years
Convertible promissory notes | Convertible Promissory Notes due December 2020, Recourse
Debt Instrument [Line Items]
Debt face amount $ 75,000,000 $ 25,000,000 $ 160,000,000
Interest rate percentage6.00%6.00%
Convertible stock price (in dollars per share) | $ / shares $ 20.61 $ 11.25
Convertible promissory notes | Convertible Promissory Notes Interest Rate 6% Due December 2020, Recourse
Debt Instrument [Line Items]
Long-term debt carrying value $ 267,289,000 263,284,000
Interest rate percentage6.00%
Convertible stock price (in dollars per share) | $ / shares $ 11.25
Unpaid principal balance $ 296,233,000 290,400,000
Long-term portion of debt267,289,000 263,284,000
Notes | Notes due July 2024, Recourse
Debt Instrument [Line Items]
Debt face amount $ 100,000,000
Long-term debt carrying value $ 96,073,000 95,555,000
Interest rate percentage10.00%10.00%
Unpaid principal balance $ 100,000,000 100,000,000
Long-term portion of debt82,073,000 88,555,000
Number of agreements | agreement5
Affiliated entity
Debt Instrument [Line Items]
Long-term debt carrying value63,492,000 64,053,000
Unpaid principal balance67,493,000 68,272,000
Long-term portion of debt $ 61,151,000 61,853,000
Affiliated entity | Convertible promissory notes | Convertible Promissory Notes due December 2019 and 2020, Recourse
Debt Instrument [Line Items]
Debt face amount $ 193,200,000
Interest rate percentage8.00%8.00%
Convertible stock price (in dollars per share) | $ / shares $ 38.64
Affiliated entity | Convertible promissory notes | Convertible Promissory Notes due December 2020, Recourse
Debt Instrument [Line Items]
Debt face amount $ 260,000,000
Interest rate percentage6.00%6.00%5.00%
Percentage of debt outstanding to maintain as collateral200.00%
Holders of debt, percentage subject to cross-acceleration provision25.00%
Indebtedness in excess of $ 15,000,000
Affiliated entity | Convertible promissory notes | Convertible Promissory Notes Interest Rate 6% Due December 2020, Recourse
Debt Instrument [Line Items]
Long-term debt carrying value27,734,000 27,734,000
Unpaid principal balance27,734,000 27,734,000
Long-term portion of debt $ 27,734,000 $ 27,734,000
Affiliated entity | Convertible redeemable common stock warrants | CPPIB
Debt Instrument [Line Items]
Number of securities called by warrants (in shares) | shares312,888
Maximum | Convertible redeemable common stock warrants | J.P. Morgan
Debt Instrument [Line Items]
Number of securities called by warrants (in shares) | shares146,666
Maximum | Convertible redeemable common stock warrants | CPPIB
Debt Instrument [Line Items]
Number of securities called by warrants (in shares) | shares166,222
Class B common stock
Debt Instrument [Line Items]
Debt conversion, shares issued (in shares) | shares5,734,440
On or after July 27, 2020 | Affiliated entity | Convertible promissory notes | Convertible Promissory Notes due December 2020, Recourse
Debt Instrument [Line Items]
Last reported sale price of common stock (at least) (in dollars per share) | $ / shares $ 22.50
Trading days (at least) | day20
Period of consecutive trading days | day30
Trading days immediately preceding redemption date | day3

Outstanding Loans and Securit_5

Outstanding Loans and Security Agreements - Non-recourse Debt Facilities (Additional Information) (Details)1 Months Ended3 Months Ended12 Months Ended
Sep. 30, 2013USD ($)Mar. 31, 2013USD ($)Mar. 31, 2019USD ($)Dec. 31, 2018USD ($)Jun. 30, 2017USD ($)agreementFeb. 28, 2017USD ($)Jun. 30, 2015USD ($)lenderJul. 31, 2014USD ($)Dec. 31, 2012USD ($)
Debt Instrument [Line Items]
Unused borrowing capacity $ 1,220,000 $ 1,220,000
Notes | Notes due July 2024, Recourse
Debt Instrument [Line Items]
Interest rate percentage10.00%10.00%
Number of agreements | agreement5
Debt face amount $ 100,000,000
Senior secured notes | Senior Secured Notes due March 2025, Non-Recourse
Debt Instrument [Line Items]
Interest rate percentage5.22%
Term loan | Term Loan due September 2028, Non-Recourse
Debt Instrument [Line Items]
Interest rate percentage7.50%
Term loan | Term Loan due October 2020, Non-Recourse
Debt Instrument [Line Items]
Interest rate percentage5.25%
Term loan | Term Loan due December 2021, Non-Recourse
Debt Instrument [Line Items]
Interest rate percentage2.50%
PPA Company II
Debt Instrument [Line Items]
Repayments of debt $ 67,985,000 65,114,000
PPA Company II | Senior secured notes | Senior Secured Notes due March 2025, Non-Recourse
Debt Instrument [Line Items]
Interest rate percentage5.22%
Total amount of loan proceeds $ 144,800,000
Repayments of debt28,800,000
Debt proceeds used for debt service reserves and issuance costs21,700,000
Debt used to fund remaining system purchases $ 94,300,000
Debt minimum debt service reserves required11,200,000 11,200,000
PPA Company IIIa
Debt Instrument [Line Items]
Repayments of debt5,209,000 4,431,000
PPA Company IIIa | Term loan | Term Loan due September 2028, Non-Recourse
Debt Instrument [Line Items]
Interest rate percentage7.50%
Debt minimum debt service reserves required3,700,000 3,700,000
Debt face amount $ 46,800,000
PPA Company IIIb
Debt Instrument [Line Items]
Repayments of debt4,238,000 3,953,000
PPA Company IIIb | Term loan | Term Loan due October 2020, Non-Recourse
Debt Instrument [Line Items]
Debt minimum debt service reserves required1,700,000 1,700,000
Debt face amount $ 32,500,000
PPA Company IIIb | Term loan | Term Loan due October 2020, Non-Recourse | LIBOR
Debt Instrument [Line Items]
LIBOR margin (as a percentage)5.20%
PPA Company IV
Debt Instrument [Line Items]
Repayments of debt16,111,000 15,543,000
PPA Company IV | Senior secured notes | Senior Secured Notes due March 2030, Non-Recourse
Debt Instrument [Line Items]
Interest rate percentage6.07%
Debt minimum debt service reserves required7,600,000 7,500,000
Debt face amount $ 99,000,000
PPA Company V
Debt Instrument [Line Items]
Repayments of debt $ 6,644,000 5,780,000
PPA Company V | Term loan | Term Loan due December 2021, Non-Recourse
Debt Instrument [Line Items]
Debt face amount $ 131,200,000
Number of lenders | lender5
Commitment fee percentage0.50%
PPA Company V | Term loan | Term Loan due December 2021, Years One Through Three, Non-Recourse | LIBOR
Debt Instrument [Line Items]
LIBOR margin (as a percentage)2.25%
PPA Company V | Term loan | Term Loan due December 2021, After Year Three, Non-Recourse | LIBOR
Debt Instrument [Line Items]
LIBOR margin (as a percentage)2.50%
Letters of Credit | PPA Company V
Debt Instrument [Line Items]
Maximum borrowing capacity $ 6,200,000 $ 6,400,000
Amount outstanding $ 5,000,000 5,000,000
Unused borrowing capacity $ 1,200,000 $ 1,200,000

Outstanding Loans and Securit_6

Outstanding Loans and Security Agreements - Schedule of Repayments (Details) - USD ($) $ in Thousands3 Months Ended
Mar. 31, 2019Mar. 31, 2018Dec. 31, 2018
Long-term Debt, Fiscal Year Maturity [Abstract]
Remainder of 2019 $ 24,082
2020391,442
2021153,639
202240,059
202344,209
Thereafter127,269
Total780,700 $ 786,495
Interest expense $ (17,600) $ (24,000)

Derivative Financial Instrume_3

Derivative Financial Instruments - Fair Value Derivatives (Details) - Derivatives designated as hedging instruments - Interest rate swap agreements - USD ($) $ in ThousandsMar. 31, 2019Dec. 31, 2018
Derivative [Line Items]
Interest rate swap agreements $ 27 $ 82
Derivative liability5,719 3,630
Prepaid expenses and other current assets
Derivative [Line Items]
Interest rate swap agreements0 42
Other long-term assets
Derivative [Line Items]
Interest rate swap agreements27 40
Accrued other current liabilities
Derivative [Line Items]
Derivative liability108 4
Derivative liabilities
Derivative [Line Items]
Derivative liability $ 5,611 $ 3,626

Derivative Financial Instrume_4

Derivative Financial Instruments - Interest Rate Swaps (Additional Information) (Details) $ in Thousands3 Months Ended
Mar. 31, 2019USD ($)Mar. 31, 2018USD ($)Jul. 31, 2015agreement
Interest rate swap
Credit Derivatives [Line Items]
Gain (loss) on derivative $ 47 $ 92
Cash flow hedging | Interest rate swap | PPA Company IIIb
Credit Derivatives [Line Items]
Notional amount24,400 25,400
Gain (loss) on derivative(12)(37)
Cash flow hedging | Interest rate swap | PPA Company V
Credit Derivatives [Line Items]
Notional amount186,100 188,100
Number of swap agreements entered into | agreement9
Gain (loss) on derivative $ 24 $ 54
Cash flow hedging | Interest rate swap maturing In 2016 | PPA Company V
Credit Derivatives [Line Items]
Number of swap agreements entered into | agreement3
Cash flow hedging | Interest rate swap maturing September 30, 2031 | PPA Company V
Credit Derivatives [Line Items]
Number of swap agreements entered into | agreement3
Cash flow hedging | Interest rate swap maturing December 21, 2021 | PPA Company V
Credit Derivatives [Line Items]
Number of swap agreements entered into | agreement3

Derivative Financial Instrume_5

Derivative Financial Instruments - Changes in Fair Value of Derivative Contracts (Details) - USD ($) $ in Thousands3 Months Ended
Mar. 31, 2019Mar. 31, 2018
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Net loss (gain) recognized in other comprehensive income (loss) $ (2,174) $ 2,858
Interest rate swap agreements
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Gain recognized in earnings(47)(92)
Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance3,548 5,853
Loss (gain) recognized in other comprehensive income (loss)2,130 (2,640)
Amounts reclassified from other comprehensive income (loss) to earnings61 (212)
Net loss (gain) recognized in other comprehensive income (loss)2,191 (2,852)
Ending balance $ 5,692 $ 2,909

Derivative Financial Instrume_6

Derivative Financial Instruments - Natural Gas Derivatives (Additional Information) (Details) - Not designated as hedging instrument - Natural gas forward contract - USD ($) $ in Millions3 Months Ended
Mar. 31, 2019Mar. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivative $ 0.4 $ (0.9)
Gain on the settlement of contracts $ 0.5 $ 1.1

Derivative Financial Instrume_7

Derivative Financial Instruments - 6% Convertible Promissory Notes (Additional Information) (Details) - 6% Convertible Promissory Notes - Convertible promissory notes - USD ($)3 Months Ended
Mar. 31, 2019Mar. 31, 2018Jan. 31, 2018Sep. 10, 2016Jan. 29, 2016Dec. 15, 2015
Debt Instrument [Line Items]
Interest rate percentage6.00%6.00%
Debt face amount $ 75,000,000 $ 25,000,000 $ 160,000,000
Convertible stock price (in dollars per share) $ 20.61 $ 11.25
Convertible debt, stock price trigger75.00%
Gain (loss) on embedded derivative $ 0 $ (7,500,000)
Embedded derivative liability $ 177,200,000

Common Stock Warrants (Details)

Common Stock Warrants (Details) - Class B common stock - Preferred stock warrants - $ / sharesMar. 31, 2019Dec. 31, 2018
Class of Warrant or Right [Line Items]
Warrants outstanding (in shares)481,182 312,939
Warrant exercise price (in dollars per share) $ 27.78 $ 38.64

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands3 Months Ended
Mar. 31, 2019Mar. 31, 2018
Income Tax Disclosure [Abstract]
Income tax provision $ 208 $ 333
Net loss before income taxes $ 88,065 $ 22,015

Net Loss per Share Attributab_3

Net Loss per Share Attributable to Common Stockholders - (Additional Information) (Details)1 Months Ended
Jul. 31, 2018shares
IPO
Subsidiary, Sale of Stock [Line Items]
Shares sold in offering (in shares)20,700,000

Stock-Based Compensation and _3

Stock-Based Compensation and Employee Benefit Plan - Stock Plan (Additional Information) (Details) - $ / shares shares in MillionsMar. 31, 2019Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average exercise price, outstanding options (in dollars per share) $ 25.41 $ 25.93
2002 Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average exercise price, outstanding options (in dollars per share) $ 21.16
2002 Stock Plan | Class B common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of outstanding options (in shares)2.2

Net Loss per Share Attributab_4

Net Loss per Share Attributable to Common Stockholders - Schedule of Basic and Diluted Net Loss per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands3 Months Ended
Mar. 31, 2019Mar. 31, 2018
Numerator:
Net loss attributable to Class A and Class B common stockholders $ (84,441) $ (17,716)
Denominator:
Weighted average shares used to compute net loss per share attributable to Class A and Class B common stockholders, basic and diluted (in shares)111,842 10,403
Net loss per share attributable to common stockholders, basic and diluted (in dollars per share) $ (0.76) $ (1.70)

Stock-Based Compensation and _4

Stock-Based Compensation and Employee Benefit Plan - Equity Incentive Plan (Additional Information) (Details) - $ / sharesMar. 31, 2019Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average exercise price, outstanding options (in dollars per share) $ 25.41 $ 25.93
2012 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average exercise price, outstanding options (in dollars per share) $ 27.12
2012 Equity Incentive Plan | Class B common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of outstanding options (in shares)10,873,302
2018 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average exercise price, outstanding options (in dollars per share) $ 20.74
2018 Equity Incentive Plan | Class A common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of outstanding options (in shares)1,947,883
Stock option | 2018 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant (in shares)20,063,687
RSUs | 2012 Equity Incentive Plan | Class B common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future issuance (in shares)12,267,679
RSUs | 2018 Equity Incentive Plan | Class A common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of outstanding options (in shares)3,980,837

Net Loss per Share Attributab_5

Net Loss per Share Attributable to Common Stockholders - Schedule of Antidilutive Securities (Details) - shares shares in Thousands3 Months Ended
Mar. 31, 2019Mar. 31, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities32,431 89,257
Convertible and non-convertible redeemable preferred stock and convertible notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities27,241 85,708
Stock options to purchase common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities5,190 3,177
Convertible redeemable preferred stock warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities0 60
Convertible redeemable common stock warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities0 312

Stock-Based Compensation and _5

Stock-Based Compensation and Employee Benefit Plan - Employee Stock Purchase Plan (Details)Mar. 31, 2019shares
2018 ESPP | Employee Stock | Class A common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future issuance (in shares)4,052,804

Stock-Based Compensation and _6

Stock-Based Compensation and Employee Benefit Plan - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands3 Months Ended12 Months Ended
Mar. 31, 2019Dec. 31, 2018
Outstanding Options/RSUs, Number of Shares
Outstanding (in shares)14,558,420
Granted (in shares)743,705
Exercised (in shares)(136,382)
Cancelled (in shares)(111,693)
Outstanding (in shares)15,054,050 14,558,420
Outstanding Options Weighted Average Exercise Price
Outstanding (in dollars per share) $ 25.93
Granted (in dollars per share)11.38
Exercised (in dollars per share)4.23
Cancelled (in dollars per share)25.44
Outstanding (in dollars per share) $ 25.41 $ 25.93
Outstanding, remaining contractual life6 years 7 months 13 days6 years 9 months 11 days
Outstanding, aggregate intrinsic value $ 4,686 $ 3,084
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Vested and expected to vest (in shares)14,690,193
Exercisable (in shares)8,555,962
Vested and expected to vest, weighted average exercise price (in dollars per share) $ 25.56
Exercisable, weighted average exercise price (in dollars per share) $ 28.18
Vested and expected to vest, remaining contractual life6 years 6 months 22 days
Exercisable, remaining contractual life4 years 11 months 19 days
Vested and expected to vest, aggregate intrinsic value $ 4,645
Exercisable, aggregate intrinsic value $ 3,586

Stock-Based Compensation and _7

Stock-Based Compensation and Employee Benefit Plan - Unvested Restricted Stock Unit Activity (Details) - Restricted Stock3 Months Ended
Mar. 31, 2019$ / sharesshares
Unvested Restricted Stock Unit Activity
Unvested balance (in shares) | shares16,784,800
Granted (in shares) | shares2,525,755
Vested (in shares) | shares(2,960,462)
Forfeited (in shares) | shares(101,577)
Unvested balance (in shares) | shares16,248,516
Weighted Average Grant Date Fair Value
Unvested balance (in dollars per share) | $ / shares $ 18.74
Granted (in dollars per share) | $ / shares12.43
Vested (in dollars per share) | $ / shares20.17
Forfeited (in dollars per share) | $ / shares16.44
Unvested balance (in dollars per share) | $ / shares $ 17.52

Stock-Based Compensation and _8

Stock-Based Compensation and Employee Benefit Plan - Weighted-Average Assumptions (Details)3 Months Ended
Mar. 31, 2019Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate2.49%
Risk-free interest rate (minimum)2.60%
Risk-free interest rate (maximum)2.60%
Expected dividend yield0.00%0.00%
Expected volatility50.20%55.10%
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (years)6 years 4 months 6 days6 years 2 months 5 days
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (years)6 years 7 months 13 days6 years 5 months 23 days

Stock-Based Compensation and _9

Stock-Based Compensation and Employee Benefit Plan - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands3 Months Ended
Mar. 31, 2019Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense $ 63,882 $ 7,956
Cost of revenue
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense14,372 1,898
Research and development
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense14,230 1,638
Sales and marketing
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense11,512 952
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense $ 23,768 $ 3,468

Stock-Based Compensation and_10

Stock-Based Compensation and Employee Benefit Plan - Stock-bases Compensation (Additional Information) (Details) - USD ($)3 Months Ended
Mar. 31, 2019Mar. 31, 2018
Share-based Arrangements with Employees and Nonemployees [Abstract]
Capitalized stock-based compensation costs $ 0 $ 0
Share-based compensation expense63,882,000 7,956,000
Unrecognized compensation cost related to unvested stock options $ 65,800,000
Expense expected to be recognized over a weighted-average period2 years 8 months 27 days
Excess tax benefits $ 0 $ 0
Restricted Stock
Share-based Arrangements with Employees and Nonemployees [Abstract]
Unrecognized stock-based compensation cost $ 145,500,000
Expense expected to be recognized over remaining weighted-average period1 year 3 months 7 days
Employee Stock Option
Share-based Arrangements with Employees and Nonemployees [Abstract]
Unrecognized stock-based compensation cost $ 8,800,000
Expense expected to be recognized over remaining weighted-average period1 year 1 month 28 days

Power Purchase Agreement Prog_3

Power Purchase Agreement Programs - Additional Information (Details) $ in Thousands3 Months Ended
Mar. 31, 2019USD ($)variable_interest_entityDec. 31, 2018USD ($)
Variable Interest Entity [Line Items]
Redeemable noncontrolling interest | $ $ 58,802 $ 57,261
Standard warranty period1 year
Number of variable interest entities | variable_interest_entity6
Minimum
Variable Interest Entity [Line Items]
Term of power purchase agreements (years)10 years
Maximum
Variable Interest Entity [Line Items]
Term of power purchase agreements (years)21 years

Power Purchase Agreement Prog_4

Power Purchase Agreement Programs - Schedule of VIEs (Details) $ in Thousands3 Months Ended12 Months Ended
Mar. 31, 2019USD ($)MWhMar. 31, 2018USD ($)Dec. 31, 2018USD ($)
Variable Interest Entity [Line Items]
Distributions to Equity Investor $ 282 $ 282
PPA Company II
Variable Interest Entity [Line Items]
Maximum size of installation (in megawatts) | MWh30
Installed size (in megawatts) | MWh30
Term of power purchase agreements (years)21 years
Income (loss) and tax benefits allocation to Equity Investor99.00%
Cash allocation to Equity Investor99.00%
Income (loss), tax and cash allocations to Equity Investor after the flip date5.00%
Company cash contributions $ 22,442
Company non-cash contributions0
Equity Investor cash contributions139,993
Debt financing144,813
Distributions to Equity Investor116,942 $ 116,942
Debt repayment—principal $ 67,985 65,114
PPA Company IIIa
Variable Interest Entity [Line Items]
Maximum size of installation (in megawatts) | MWh10
Installed size (in megawatts) | MWh10
Term of power purchase agreements (years)15 years
Income (loss) and tax benefits allocation to Equity Investor99.00%
Cash allocation to Equity Investor99.00%
Income (loss), tax and cash allocations to Equity Investor after the flip date5.00%
Company cash contributions $ 32,223
Company non-cash contributions8,655
Equity Investor cash contributions36,967
Debt financing44,968
Distributions to Equity Investor4,246 4,063
Debt repayment—principal $ 5,209 4,431
PPA Company IIIb
Variable Interest Entity [Line Items]
Maximum size of installation (in megawatts) | MWh6
Installed size (in megawatts) | MWh5
Term of power purchase agreements (years)15 years
Income (loss) and tax benefits allocation to Equity Investor99.00%
Cash allocation to Equity Investor99.00%
Income (loss), tax and cash allocations to Equity Investor after the flip date5.00%
Company cash contributions $ 22,658
Company non-cash contributions2,082
Equity Investor cash contributions20,152
Debt financing28,676
Distributions to Equity Investor1,907 1,807
Debt repayment—principal $ 4,238 3,953
PPA Company IV
Variable Interest Entity [Line Items]
Maximum size of installation (in megawatts) | MWh21
Installed size (in megawatts) | MWh19
Term of power purchase agreements (years)15 years
Income (loss) and tax benefits allocation to Equity Investor90.00%
Cash allocation to Equity Investor90.00%
Company cash contributions $ 11,669
Company non-cash contributions0
Equity Investor cash contributions84,782
Debt financing99,000
Distributions to Equity Investor4,982 4,568
Debt repayment—principal $ 16,111 15,543
PPA Company V
Variable Interest Entity [Line Items]
Maximum size of installation (in megawatts) | MWh40
Installed size (in megawatts) | MWh37
Term of power purchase agreements (years)15 years
Income (loss) and tax benefits allocation to Equity Investor99.00%
Cash allocation to Equity Investor90.00%
Company cash contributions $ 27,932
Company non-cash contributions0
Equity Investor cash contributions227,344
Debt financing131,237
Distributions to Equity Investor68,944 66,745
Debt repayment—principal $ 6,644 $ 5,780

Power Purchase Agreement Prog_5

Power Purchase Agreement Programs - Schedule of PPA Entities' Assets and Liabilities (Details) - USD ($) $ in ThousandsMar. 31, 2019Dec. 31, 2018
Current assets:
Cash and cash equivalents[1] $ 320,414 $ 220,728
Restricted cash, current[1]18,419 28,657
Accounts receivable[1]84,070 84,887
Customer financing receivable[1]5,717 5,594
Total current assets639,842 672,581
Property, plant and equipment, net[1]475,385 481,414
Non-current portion of investment in sales-type financing leases[1]65,620 67,082
Restricted cash, non-current[1]31,101 31,100
Other long-term assets[1]34,386 34,792
Total assets1,318,850 1,389,668
Current liabilities:
Accounts payable[1]64,425 66,889
Accrued other current liabilities[1]67,966 69,535
Deferred Revenue And Customer Deposits, Current[1]89,557 94,158
Current portion of debt37,510 29,848
Total current liabilities276,194 279,666
Derivative liabilities[1]11,166 10,128
Deferred revenue and customer deposits[1]201,863 241,794
Long-term portion of debt703,568 711,433
Other long-term liabilities[1]58,032 55,937
Total liabilities1,250,823 1,298,958
Variable Interest Entity, Primary Beneficiary
Current assets:
Cash and cash equivalents9,071 5,295
Restricted cash, current5,040 2,917
Accounts receivable7,431 7,516
Customer financing receivable5,717 5,594
Prepaid expenses and other current assets3,172 4,909
Total current assets30,431 26,231
Property, plant and equipment, net391,121 399,060
Non-current portion of investment in sales-type financing leases65,620 67,082
Restricted cash, non-current27,851 27,854
Other long-term assets2,614 2,692
Total assets517,637 522,919
Current liabilities:
Accounts payable426 724
Accrued other current liabilities1,100 1,442
Deferred Revenue And Customer Deposits, Current786 786
Current portion of debt21,827 21,162
Total current liabilities24,139 24,114
Derivative liabilities5,611 3,626
Deferred revenue and customer deposits8,502 8,696
Long-term portion of debt317,958 323,360
Other long-term liabilities1,938 1,798
Total liabilities $ 358,148 $ 361,594
[1]We have variable interest entities which represent a portion of the consolidated balances are recorded within the "Cash and cash equivalents," "Restricted cash," "Accounts receivable," "Customer financing receivable," "Prepaid expenses and other current assets," "Property and equipment, net," "Customer financing receivable, non-current," "Restricted cash, non-current," "Other long-term assets," "Accounts payable," "Accrued other current liabilities," "Deferred revenue and customer deposits," "Current portion of non-recourse debt from related parties," "Derivative liabilities, net of current portion," "Deferred revenue and customer deposits, net of current portion," "Long-term portion of non-recourse debt," and "Other long-term liabilities" financial statement line items in the Condensed Consolidated Balance Sheets (see Note 12).

Power Purchase Agreement Prog_6

Power Purchase Agreement Programs - Schedule of Consolidated Assets and Liabilities (Details) - USD ($) $ in ThousandsMar. 31, 2019Dec. 31, 2018
Variable Interest Entity [Line Items]
Current assets $ 639,842 $ 672,581
Long-term assets679,008 717,087
Total assets1,318,850 1,389,668
Current liabilities238,684 249,818
Current portion of debt37,510 29,848
Long-term liabilities271,061 307,859
Long-term portion of debt703,568 711,433
Total liabilities1,250,823 1,298,958
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Current assets30,431 26,231
Long-term assets487,206 496,688
Total assets517,637 522,919
Current liabilities2,312 2,952
Current portion of debt21,827 21,162
Long-term liabilities16,051 14,120
Long-term portion of debt317,958 323,360
Total liabilities358,148 361,594
Bloom
Variable Interest Entity [Line Items]
Current assets609,411 646,350
Long-term assets191,802 220,399
Total assets801,213 866,749
Current liabilities236,372 246,866
Current portion of debt15,683 8,686
Long-term liabilities255,010 293,739
Long-term portion of debt385,610 388,073
Total liabilities $ 892,675 $ 937,364

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Details)3 Months Ended12 Months Ended
Mar. 31, 2019USD ($)employeeMar. 31, 2018USD ($)Dec. 31, 2018USD ($)employeeFeb. 28, 2017USD ($)Jun. 30, 2015USD ($)Mar. 31, 2012USD ($)employee
Operating Leased Assets [Line Items]
Operating leases, rent expense $ 2,000,000 $ 1,400,000
Sale leaseback rent expense0 $ 0
Grants receivable $ 16,500,000
Number of employees to be hired per incentive grant agreement | employee900
Minimum cumulative employee compensation, recapture period one $ 108,000,000
Minimum cumulative employee compensation, recapture period three324,000,000
Cumulative compensation expense incurred99,300,000 92,000,000
Proceeds from government grants12,000,000
Grant agreement, maximum possible repayment amount, recapture period two5,000,000
Grant agreement, maximum possible repayment amount, recapture period three $ 2,500,000
Grant agreement, recapture provision repayments1,500,000
Delaware grant obligation $ 10,469,000 $ 10,469,000
Self-Generation Incentive Program, percentage of incentive issued in the first year50.00%
Self-Generation Incentive Program, subsequent payment period5 years
Delaware
Operating Leased Assets [Line Items]
Number of full time employees | employee334 338
PPA Company V
Operating Leased Assets [Line Items]
PPA expenses $ 3,500,000 $ 900,000
Term loan | PPA Company V | Term Loan due December 2021, Non-Recourse
Operating Leased Assets [Line Items]
Debt face amount $ 131,200,000
Letters of Credit | PPA Company V
Operating Leased Assets [Line Items]
Maximum borrowing capacity $ 6,200,000 $ 6,400,000
Amount outstanding $ 5,000,000 $ 5,000,000

Commitments and Contingencies_2

Commitments and Contingencies - Minimum Lease Payments (Details) $ in ThousandsMar. 31, 2019USD ($)
Future Minimum Lease Payments Under Operating Leases
Remainder of 2019 $ 13,491
202018,785
202116,169
202215,673
202315,335
Thereafter57,310
Total operating leases, future minimum payments due $ 136,763

Related Party Transactions - Sc

Related Party Transactions - Schedule of Related Party Transactions (Details) - USD ($) $ in Thousands3 Months Ended
Mar. 31, 2019Mar. 31, 2018
Related Party Transactions [Abstract]
Total revenue from related parties $ 813 $ 29,269
Consulting expenses paid to related parties (included in general and administrative expense)50 51
Interest expense on debt to related parties $ 1,612 $ 2,627

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Details) - USD ($)3 Months Ended12 Months Ended
Mar. 31, 2019Mar. 31, 2018Dec. 31, 2018
Related Party Transaction [Line Items]
Interest paid $ 14,545,000 $ 11,216,000
Interest expense on debt to related parties1,612,000 $ 2,627,000
Softbank Corp.
Related Party Transaction [Line Items]
Accounts receivable2,700,000 $ 2,400,000
Consulting Agreement | General Colin L. Powell | Director
Related Party Transaction [Line Items]
Related party amount of transaction125,000
PPA Company IIIa
Related Party Transaction [Line Items]
Repayments of debt5,209,000 $ 4,431,000
PPA Company IIIa | Term loan | Term Loan due September 2028, Non-Recourse | Affiliated entity
Related Party Transaction [Line Items]
Repayments of debt800,000
Interest paid $ 800,000

Related Party Transactions - De

Related Party Transactions - Debt to Related Parties (Details) - USD ($) $ in ThousandsMar. 31, 2019Dec. 31, 2018
Related Party Transaction [Line Items]
Unpaid principal balance $ 780,700 $ 786,495
Current portion of debt37,510 29,848
Long-term portion of debt703,568 711,433
Total741,078 741,281
Affiliated entity
Related Party Transaction [Line Items]
Unpaid principal balance67,493 68,272
Current portion of debt2,341 2,200
Long-term portion of debt61,151 61,853
Total $ 63,492 64,053
Convertible Promissory Notes Interest Rate 6% Due December 2020, Recourse | Convertible promissory notes
Related Party Transaction [Line Items]
Interest rate percentage6.00%
Unpaid principal balance $ 296,233 290,400
Current portion of debt0 0
Long-term portion of debt267,289 263,284
Total267,289 263,284
Convertible Promissory Notes Interest Rate 6% Due December 2020, Recourse | Convertible promissory notes | Affiliated entity
Related Party Transaction [Line Items]
Unpaid principal balance27,734 27,734
Current portion of debt0 0
Long-term portion of debt27,734 27,734
Total $ 27,734 27,734
Term Loan due September 2028, Non-Recourse | Term loan
Related Party Transaction [Line Items]
Interest rate percentage7.50%
Unpaid principal balance $ 39,759 40,538
Current portion of debt2,341 2,200
Long-term portion of debt33,417 34,119
Total35,758 36,319
Term Loan due September 2028, Non-Recourse | Term loan | Affiliated entity
Related Party Transaction [Line Items]
Unpaid principal balance39,759 40,538
Current portion of debt2,341 2,200
Long-term portion of debt33,417 34,119
Total $ 35,758 $ 36,319

Uncategorized Items - be-201903

LabelElementValue
Parent [Member]
Cumulative Effect of New Accounting Principle in Period of Adoptionus-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption $ 130,000
Noncontrolling Interest [Member]
Cumulative Effect of New Accounting Principle in Period of Adoptionus-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption(130,000)
Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoptionus-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption $ 130,000