STOCK-BASED COMPENSATION - Fair Value Assumptions (Details) - $ / shares |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
|
| Chief Executive Officer | |||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Volatility | 50.00% | ||
| Dividend yield | 0.00% | ||
| Risk-free rate | 1.10% | ||
| Expected term (in years) | 10 years | ||
| Initial stock price (in USD per share) | $ 21.72 | ||
| Stock Options | |||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Volatility | 49.50% | 41.30% | 34.50% |
| Dividend yield | 0.00% | 0.00% | 0.00% |
| Risk-free rate | 1.10% | 0.30% | 1.80% |
| Expected term (in years) | 5 years 7 months 6 days | 5 years 3 months 18 days | 6 years 10 months 24 days |