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SHARE BASED COMPENSATION - Compensation Expenses (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]    
Compensation expense $ 343 $ 124
Stock options    
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]    
Compensation expense 218 103
Restricted stocks and Performance-based shares    
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]    
Compensation expense $ 125 $ 21