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STOCK INCENTIVE PLANS - Stock Option Narratives (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award |  |  |
Vesting period (in years) | 4 years |  |
Pre-tax intrinsic value of options exercised | $ 5.6 | $ 1.3 | $ 10.9
Intrinsic value of options exercised | 7.4 | 8.9 |
Intrinsic value of options outstanding | 7.4 | 8.9 |
Proceeds from issuance of common stock on exercise of stock options | $ 0.4 | 0.3 | 0.8
Issuance of common stock upon exercise of stock options (in shares) | 2,014,063 |  |
Stock options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |
Grant date fair value of options vested | $ 2.8 | $ 3.4 | $ 3.9
Share-based compensation expense not yet recognized | $ 1.0 |  |
Share-based compensation not yet recognized, recognition period (in years) | 3 months 18 days |  |
Stock options | Common stock |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |
Shares repurchased (in shares) |  |  | 0
Stock options | 2021 Stock Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |
Vesting period (in years) | 4 years |  |
Nonstatutory options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |
Purchase price as a percentage of common stock (percent) | 100.00% |  |
Cashless Method Stock Option Exercised |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |
Issuance of common stock upon exercise of stock options (in shares) | 98,403 | 0 | 0
Other Than Ten Percent Holder | Stock options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |
Purchase price as a percentage of common stock (percent) | 100.00% |  |
Chief Executive Officer | Stock options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |
Shares subject to repurchase related to stock options early exercised and not yet vested (in shares) | 92,230 | 393,251 |
Chief Executive Officer | Weighted average stock options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |
Shares subject to repurchase related to stock options early exercised and not yet vested | $ 0.1 | $ 0.6 |
Minimum | Ten Percent Holder | Stock options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |
Purchase price as a percentage of common stock (percent) | 110.00% |  |

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