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STOCK-BASED COMPENSATION - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Mar. 31, 2021
Dec. 31, 2020
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Sep. 14, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Common stock, capital shares reserved for future issuance             250,000
Common stock reserved for issuance to participants 92,562       92,562    
Granted, Number of share of restricted stock (shares)         158,171    
Stock-based compensation $ 699     $ 334 $ 1,795 $ 571  
Restricted stock units              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Granted, Number of share of restricted stock (shares)         180,605 10,310  
Total compensation cost not yet recognized 1,776       $ 1,776    
Weighted average service period         1 year 2 months 23 days    
Granted, weighted average grant date fair value (usd per share)         $ 15.93 $ 9.01  
Stock-based compensation $ 640     334 $ 1,554 $ 571  
Restricted stock units, type 1              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Granted, Number of share of restricted stock (shares)         66,220    
Restricted stock units, type 1 | Vesting period one              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Granted, Number of share of restricted stock (shares)   53,075          
Restricted stock units, type 2              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Granted, Number of share of restricted stock (shares)         60,451    
Restricted stock units, type 2 | Vesting period two              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Granted, Number of share of restricted stock (shares)   73,596          
Restricted stock units, time              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Granted, Number of share of restricted stock (shares) 6,000       31,500    
Stock options              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Exercise price as a percentage of the fair market value of a share of common stock         100.00%    
Expired, number of options (shares)     5,000        
Options, outstanding, weighted average exercise price     $ 24.90        
Stock options | Minimum              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Expiration period         5 years    
Stock options | Maximum              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Expiration period         10 years    
Restricted common stock              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Total compensation cost not yet recognized $ 167       $ 167    
Granted, weighted average grant date fair value (usd per share)         $ 9.57    
Remaining expected life         1 year 29 days    
Stock-based compensation $ 59     $ 0 $ 241 $ 0  
Non-Employee Director | Restricted stock units              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Granted, Number of share of restricted stock (shares)         22,434    
Number outstanding 230,757       230,757