Balance Sheet Components - Summary of Property and Equipment, Net (Details) - USD ($) $ in Thousands |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Property Plant And Equipment [Line Items] | ||
| Total property and equipment | $ 27,474 | $ 67,605 |
| Less: accumulated depreciation and amortization | (24,980) | (39,933) |
| Total property and equipment, net | 2,494 | 27,672 |
| Laboratory Equipment | ||
| Property Plant And Equipment [Line Items] | ||
| Total property and equipment | 17,334 | 19,014 |
| Leasehold Improvements | ||
| Property Plant And Equipment [Line Items] | ||
| Total property and equipment | 7,787 | 26,244 |
| Computer Equipment and Software | ||
| Property Plant And Equipment [Line Items] | ||
| Total property and equipment | 1,793 | 1,893 |
| Furniture and Fixtures | ||
| Property Plant And Equipment [Line Items] | ||
| Total property and equipment | 560 | 902 |
| Manufacturing Equipment | ||
| Property Plant And Equipment [Line Items] | ||
| Total property and equipment | 0 | 19,485 |
| Construction in Progress | ||
| Property Plant And Equipment [Line Items] | ||
| Total property and equipment | $ 0 | $ 67 |