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Equity Incentive Plans - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | Dec. 31, 2021 | Jul. 31, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |
Weighted-average grant-date fair values of options granted |  |  | $ 9.58 | $ 10.56 |  |
Aggregate intrinsic value of options exercised | $ 1,700 |  | $ 4,600 |  |  |
Unrecognized stock-based compensation of unvested options | $ 25,300 |  | $ 25,300 |  |  |
Weighted-average period expected to recognize |  |  | 2 years 9 months 18 days |  |  |
Dividend yield |  |  | 0.00% |  |  |
Common stock reserved for future issuance | 13,485,910 |  | 13,485,910 |  | 11,221,882 |
Description of Transaction of Future issuance |  |  | These annual increases shall be equal to the lesser of (i) 5% of the aggregate number of shares of Common Stock outstanding on the final day of the immediately preceding calendar year and (ii) such smaller number of shares of Common Stock as determined by the Board, subject to certain limitations. |  |  |
Number of Shares, Granted |  |  | 1,375,700 |  |  |
Stock based compensation | $ 2,400 | $ 1,900 | $ 7,500 | $ 3,000 |  |
Share of common stock purchased | 3,223 | 1,899 | 9,729 | 3,107 |  |
Restricted Stock Units RSU |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |
Unrecognized stock-based compensation of unvested options | 9,000 |  | $ 9,000 |  |  |
Weighted-average period expected to recognize |  |  | 3 years 1 month 6 days |  |  |
Stock based compensation | $ 700 | 100 | $ 2,000 | 100 |  |
2011 Plan |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |
Common stock available for issuance |  |  |  |  | 5,321,687 |
2021 Plan |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |
Common stock available for issuance | 6,431,924 |  | 6,431,924 |  |  |
Common stock reserved for future issuance | 5,200,000 |  | 5,200,000 |  |  |
2021 Employee Stock Purchase Plan |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |
Collected withholdings under plan |  |  | $ 600 |  |  |
Common stock reserved for future issuance | 1,325,047 |  | 1,325,047 |  |  | 850,000
Stock based compensation | $ 100 | $ 0 | $ 200 | $ 0 |  |
Share of common stock purchased |  |  | $ 0 |  |  |

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