Document and Entity Information
Document and Entity Information | Oct. 10, 2020 |
Cover [Abstract] | |
Entity Registrant Name | IONIS PHARMACEUTICALS INC |
Amendment Flag | false |
Entity Central Index Key | 0000874015 |
Document Type | 8-K |
Document Period End Date | Oct. 10, 2020 |
Entity Incorporation State Country Code | DE |
Entity File Number | 000-19125 |
Entity Tax Identification Number | 33-0336973 |
Entity Address, Address Line One | 2855 Gazelle Court |
Entity Address, City or Town | Carlsbad |
Entity Address, State or Province | CA |
Entity Address, Postal Zip Code | 92010 |
City Area Code | (760) |
Local Phone Number | 931-9200 |
Written Communications | false |
Soliciting Material | false |
Pre Commencement Tender Offer | false |
Pre Commencement Issuer Tender Offer | false |
Security 12b Title | Common Stock, $.001 Par Value |
Trading Symbol | IONS |
Security Exchange Name | NASDAQ |
Entity Emerging Growth Company | false |