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EMPLOYEE STOCK COMPENSATION - Unrecognized Stock-based Compensation Expense (Details) - Restricted stock awards and restricted stock units
$ in Thousands
12 Months Ended
Dec. 31, 2021
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unrecognized Expense $ 6,045
Weighted-Average Remaining Expected Recognition Period 2 years