STOCKHOLDERS' DEFICIT - Stock-based compensation (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
|
| Stock Based Compensation Expense | ||
| Stock-based compensation expense | $ 5.7 | $ 4.3 |
| Total estimated unrecognized compensation cost related to nonvested stock-based compensation arrangements | $ 25.7 | |
| Weighted average period recognized | 1 year 2 months 12 days | |
| Board of director stock award expense | ||
| Stock Based Compensation Expense | ||
| Stock-based compensation expense | $ 1.3 | |
| Performance stock unit expense | ||
| Stock Based Compensation Expense | ||
| Stock-based compensation expense | 0.8 | 0.1 |
| Restricted stock unit expense | ||
| Stock Based Compensation Expense | ||
| Stock-based compensation expense | $ 2.6 | $ 2.1 |