Balance Sheet Components - Schedule of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands |
Sep. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Balance Sheet Related Disclosures [Abstract] | ||
| Accrued compensation expenses | $ 20,871 | $ 24,868 |
| Accrued clinical expenses | 17,148 | 6,518 |
| Accrued expenses related to purchase of IPR&D | 0 | 102 |
| Accrued vendor expenses | 12,987 | 11,300 |
| Current portion of early exercised options and restricted common stock liability | 0 | 35 |
| Other accrued expenses | 236 | 1,475 |
| Total accrued expenses and other current liabilities | $ 51,242 | $ 44,298 |