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Stock-Based Compensation - Summary of Stock-based Compensation Expense Recognized (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total stock-based compensation expense included in expenses | $ 8,982 | $ 4,481 | $ 24,045 | $ 12,670
Research and development expenses [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total stock-based compensation expense included in expenses | 3,016 | 1,145 | 7,062 | 3,571
General and administrative expenses [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total stock-based compensation expense included in expenses | 5,966 | 3,336 | 16,983 | 9,099
Employee Stock Option [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total stock-based compensation expense included in expenses | 3,467 | 1,320 | 8,148 | 4,311
Restricted stock and restricted stock units [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total stock-based compensation expense included in expenses | 5,440 | 2,699 | 14,879 | 7,251
Employee Stock Purchase Plan [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total stock-based compensation expense included in expenses | $ 75 | $ 462 | $ 1,018 | $ 1,108

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