Stockholder's Equity - Summary of Stock-Based Compensation Expense (Detail) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | ||||
| Allocated share based compensation expense | $ 35,711 | $ 27,535 | $ 66,105 | $ 51,084 |
| Research and Development [Member] | ||||
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | ||||
| Allocated share based compensation expense | 15,935 | 13,542 | 29,516 | 25,220 |
| Selling, General and Administrative Expenses [Member] | ||||
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | ||||
| Allocated share based compensation expense | $ 19,776 | $ 13,993 | $ 36,589 | $ 25,864 |