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Stock-Based Compensation - Narrative (Details) $ / shares in Units, $ in Thousands | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Jul. 31, 2021 | Dec. 31, 2023 USD ($) Vote $ / shares shares | Dec. 31, 2022 USD ($) $ / shares shares | Jul. 16, 2021 $ / shares shares | Jan. 31, 2021 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Weighted average grant date fair value of options granted (in dollars per share) | $ / shares |  | $ 2.35 | $ 2.32 |  |
Aggregate intrinsic value of the stock options exercised |  | $ 8,700 | $ 4,400 |  |
Number of shares purchased from issuance of warrants (in shares) | shares |  | 15,642,220 | 16,746,194 | 14,325,000 |
Weighted Average Exercise Price | $ / shares |  |  |  | $ 11.50 |
Stock compensation expense |  | $ 24,151 | $ 22,498 |  |
Unrecognized compensation expense |  | $ 200 |  |  |
Weighted average period expected of recognition |  | 6 months |  |  |
Finback Common Stock Warrants 2021 |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Number of shares purchased from issuance of warrants (in shares) | shares |  |  |  |  | 131,713
Sales and marketing |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Stock compensation expense |  | $ 9,387 | 10,038 |  |
Finback BDA |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Number of shares purchased from issuance of warrants (in shares) | shares |  |  |  |  | 2,552,913
Weighted Average Exercise Price | $ / shares |  |  |  |  | $ 0.42
Fair value of shares |  | $ 19,500 |  |  |
Shares issuable upon exercise of warrant (in shares) | shares |  | 117,423 |  |  |
Aggregate intrinsic value of warrants exercisable |  | $ 500 |  |  |
Class of warrant or right, unissued (in shares) | shares |  | 1,199,904 |  |  |
Intrinsic value of warrants unvested |  | $ 9,100 |  |  |
Number of warrants exercised (in shares) | shares |  | 1,103,873 |  |  |
Finback BDA | Expected term (in years) |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Measurement input | Vote |  | 3.0 |  |  |
Finback BDA | Sales and marketing |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Stock compensation expense |  | $ 3,100 | 4,500 |  |
Unvested restricted stock units |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Grant date fair value of restricted stock |  | $ 33,000 | 24,900 |  |
Vesting period |  | 3 years |  |  |
Total fair value of shares vested |  | $ 10,100 | $ 3,800 |  |
Unvested performance stock units | Share-based Payment Arrangement, Tranche One |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting percentage |  | 50.00% |  |  |
Unvested performance stock units | Share-based Payment Arrangement, Tranche Two |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting percentage |  | 50.00% |  |  |
Unvested Stock Options and Restricted Stock Units |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Unrecognized compensation expense |  | $ 40,800 |  |  |
Weighted average period expected of recognition |  | 2 years 1 month 6 days |  |  |
Maximum | Share-based Payment Arrangement, Tranche Two |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting period |  | 5 years |  |  |
2021 Equity Incentive Plan |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Number of shares of common stock may be issued (in shares) | shares |  | 21,177,295 |  |  |
Annual increase of total common shares outstanding |  | 5.00% |  |  |
Number of shares remained available for future grant (in shares) | shares |  | 14,007,370 |  |  |
Threshold percentage |  | 100.00% |  |  |
2021 Equity Incentive Plan | Maximum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Term of stock option |  | 10 years |  |  |
2021 Employee Stock Purchase Plan |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Number of shares remained available for future grant (in shares) | shares |  | 6,315,248 |  | 3,435,748 |
Percent of increase of outstanding number of common stock | 1.00% |  |  |  |

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