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EMPLOYEE STOCK COMPENSATION - Summary of Stock Options (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Payment Arrangement [Abstract]      
Fair value of options vested $ 0 $ 8 $ 67
Total intrinsic value of options exercised $ 191 $ 29 $ 87