Property and Equipment, Net - Schedule of Property and Equipment, Net (Detail) - USD ($) $ in Thousands |
Mar. 31, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, gross | $ 64,248 | $ 64,248 |
| Less: Accumulated depreciation and amortization | (57,394) | (56,613) |
| Property and equipment, net | 6,854 | 7,635 |
| Laboratory Equipment [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, gross | 23,852 | 23,852 |
| Computer Equipment [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, gross | 4,058 | 4,058 |
| Furniture and Office Equipment [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, gross | 4,523 | 4,523 |
| Leasehold Improvements [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, gross | 30,954 | 30,954 |
| Construction in Progress [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, gross | $ 861 | $ 861 |