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EMPLOYEE STOCK COMPENSATION - Unrecognized Stock-based Compensation Expense (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2020
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unrecognized Expense $ 6,869
Weighted-Average Remaining Expected Recognition Period 2 years
Restricted stock awards and restricted stock units  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unrecognized Expense $ 6,869
Weighted-Average Remaining Expected Recognition Period 2 years