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Stock-Based Compensation - Additional Information (Details) - USD ($) | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Jul. 20, 2021 | Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Stock-based compensation not yet recognized related to unvested options | $ 13,046,000 |  | $ 13,046,000 |  |  |
Unrecognized compensation expense | 0 |  | 0 |  |  | $ 386,000
Stock Options |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Stock-based compensation expense | 673,000 |  | $ 673,000 |  |  |
Unvested award, cost not yet recognized, period for recognition |  |  | 4 years |  |  |
Profit Unit Interest |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Stock-based compensation expense | $ 270,000 | $ 0 | $ 499,000 | $ 0 |  |
Equity Incentive Plan 2021 | Stock Options |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Award vesting period |  |  | 4 years |  |  |
Award expiration period |  |  | 10 years |  |  |
Equity Incentive Plan 2021 | Stock Options | Share-based Payment Arrangement, Tranche One |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Award vesting period |  |  | 1 year |  |  |
Award vesting percentage |  |  | 25.00% |  |  |
Equity Incentive Plan 2021 | Stock Options | Share-based Payment Arrangement, Tranche Two |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Award vesting period |  |  | 36 months |  |  |
Award vesting percentage |  |  | 75.00% |  |  |
Class A Common Stock | Equity Incentive Plan 2021 |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of shares authorized for issuance (in shares) |  |  |  |  | 11,500,000 |

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