Property and Equipment, net - Summary of Property and Equipment, Net (Detail) - USD ($) $ in Thousands |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Property, Plant and Equipment [Line Items] | ||
| Total property and equipment, gross | $ 207,661 | $ 206,903 |
| Accumulated depreciation | (99,593) | (91,052) |
| Total property and equipment, net | 108,068 | 115,851 |
| Computer Equipment [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Total property and equipment, gross | 4,152 | 4,152 |
| Furniture, Fixtures and Other [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Total property and equipment, gross | 8,554 | 8,554 |
| Laboratory Equipment [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Total property and equipment, gross | 44,950 | 43,575 |
| Leasehold Improvements [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Total property and equipment, gross | 146,788 | 146,667 |
| Construction Work in Process [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Total property and equipment, gross | $ 3,217 | $ 3,955 |