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Stock-Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Mar. 14, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Stock Options [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Stock-based compensation expense |  | $ 0.8 | $ 0.7 | $ 2.5 | $ 2.7
Unrecognized stock-based compensation expense |  | $ 5.4 |  | $ 5.4 |
Weighted-average recognition period |  |  |  | 2 years 8 months 15 days |
Number of shares vested and unvested stock options outstanding |  | 5,025,926 |  | 5,025,926 |
Restricted Stock Units (RSUs) [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Stock-based compensation expense |  |  | $ 0.1 | $ 0.1 | $ 0.2
Unrecognized stock-based compensation expense |  | $ 0.2 |  | $ 0.2 |
Weighted-average recognition period |  |  |  | 1 year 4 months 28 days |
2021 Employee Stock Purchase Plan [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Discount from market price, offering date |  |  |  | 85.00% |
Discount from market price, purchase date |  |  |  | 85.00% |
Employee Stock Purchase Plan, Offering Period |  |  |  | Offering periods are generally six months long; offering periods begin on June 1 and December 1 of each year. The Company issued zero and 11,518 shares of common stock under the ESPP during the three and nine months ended September 30, 2025 and zero and 54,314 shares of common stock under the ESPP during the three and nine months ended September 30, 2024. |
Common stock, share issued |  | 0 | 0 | 11,518 | 54,314
2021 Equity Incentive Plan [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Vesting period |  |  |  | 3 years |
Repricing of Outstanding and Unexercised Options [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Incremental stock-based compensation expense | $ 0.9 |  |  |  |
New excercise price | $ 2.97 |  |  |  |
Number of shares vested and unvested stock options outstanding | 1,557,301,000 |  |  |  |
Exercise prices original low | $ 3.02 |  |  |  |
Exercise prices original high | $ 27.49 |  |  |  |
Vested stock option awards expensed repricing | $ 0.5 |  |  |  |
Unvested stock option awards unrecognized expense repricing | $ 0.4 |  |  |  |
Weighted average vesting period terms repricing | 2 years 4 months 17 days |  |  |  |
Employees [Member] | 2021 Equity Incentive Plan [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Vesting, description |  |  |  | The equity-based awards for employees generally vest over a four-year period. For initial equity-based awards granted to employees, the first vest is generally a one-year cliff vest, followed by monthly vesting for the final three years. Thereafter, annual equity-based awards granted to employees typically vest monthly over the four-year vest term, except for restricted stock units which vest annually over a four year period. |
Vesting period |  |  |  | 4 years |

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