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EQUITY BASED COMPENSATION - Compensation expense and unrecognized compensation (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
EQUITY BASED COMPENSATION    
Equity-based employee compensation expense $ 5,489 $ 3,983
Sales, general, and administrative    
EQUITY BASED COMPENSATION    
Equity-based employee compensation expense 5,307 3,821
Research and development    
EQUITY BASED COMPENSATION    
Equity-based employee compensation expense $ 182 $ 163