Other Balance Sheet Accounts - Schedule of Other Noncurrent Assets (Details) - USD ($) $ in Thousands |
Sep. 30, 2026 |
Dec. 31, 2025 |
||
|---|---|---|---|---|
| Organization, Consolidation and Presentation of Financial Statements [Abstract] | ||||
| Strategic investments | $ 178,135 | $ 91,000 | ||
| Prepaid research and development arrangements, net of current portion | 117,354 | 60,843 | ||
| Operating lease right-of-use assets | 76,899 | 22,724 | ||
| Investment tax credit receivable, net of current portion | 19,778 | 0 | ||
| Materials and supplies, net of current portion | [1] | 10,431 | 0 | |
| Other noncurrent assets | 21,149 | 13,548 | ||
| Total other noncurrent assets | $ 423,746 | $ 188,115 | ||
| ||||