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Stockholders' Equity - Summary of Changes in Stockholders' Equity (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Class of Stock [Line Items] |  |
Beginning balance | $ 554,196 | $ 467,449
Stock-based compensation expense | 8,899 | 6,238
Unrealized (loss) gain on short-term investments | (974) | 470
Employee withholdings ESPP | 309 | 196
Proceeds from exercise of stock options | 1,859 | 2,278
Net Income (Loss) | (72,400) | (41,126)
Ending balance | 491,889 | 435,505
Common Stock [Member] |  |
Class of Stock [Line Items] |  |
Beginning balance | $ 8 | $ 7
Beginning balance, shares | 84,826,632 | 68,111,385
Stock purchase under ESPP, shares | 35,463 | 16,537
Vesting of RSU, shares | 3,750 | 5,000
Prefunded warrants, exercise, shares |  | 85,998
Proceeds from exercise of stock options, shares | 113,841 | 276,506
Ending balance | $ 8 | $ 7
Ending balance, shares | 84,979,686 | 68,495,426
Additional Paid-In Capital [Member] |  |
Class of Stock [Line Items] |  |
Beginning balance | $ 1,456,370 | $ 1,161,288
Stock-based compensation expense | 8,899 | 6,238
Employee withholdings ESPP | 309 | 196
Proceeds from exercise of stock options | 1,859 | 2,278
Ending balance | 1,467,437 | 1,170,000
Accumulated Other Comprehensive(Loss) / Income [Member] |  |
Class of Stock [Line Items] |  |
Beginning balance | 218 | (806)
Unrealized (loss) gain on short-term investments | (974) | 470
Ending balance | (756) | (336)
Accumulated Deficit [Member] |  |
Class of Stock [Line Items] |  |
Beginning balance | (902,400) | (693,040)
Net Income (Loss) | (72,400) | (41,126)
Ending balance | $ (974,800) | $ (734,166)

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