FAIR VALUE MEASUREMENTS - Activity Measured on a Recurring Basis (Details) - Non-employee Earnouts $ in Thousands |
12 Months Ended |
|---|---|
|
Dec. 31, 2021
USD ($)
| |
| Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | |
| Balance, December 31, 2020 | $ 0 |
| Initial valuation of the Non-employee Earnout liability | 68,412 |
| Mark-to-market (gain) on Non-employee Earnout liability | (46,946) |
| Balance, December 31, 2021 | $ 21,466 |