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SHARE-BASED COMPENSATION - Summary of Stock options activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Mar. 31, 2020
2018 Incentive Compensation Plan      
Weighted Average Remaining Contractual Life and Intrinsic Value      
Common stock available for issuance     2,300,000
Stock options      
Number of units      
Outstanding at the beginning 59,000    
Awards granted 35,000    
Forfeited (59,000)    
Outstanding at the end 35,000 59,000  
Weighted Average Exercise Price      
Outstanding at the beginning (in dollars per share) $ 13.63    
Granted (in dollars per share) 14.44    
Forfeited (in dollars per share) 13.63    
Outstanding at the end (in dollars per share) 14.44 $ 13.63  
Weighted Average Fair Value      
Outstanding at the beginning (in dollars per share) 7.69    
Granted (in dollars per share) 8.67    
Forfeited (in dollars per share) 7.69    
Outstanding at the end (in dollars per share) $ 8.67 $ 7.69  
Weighted Average Remaining Contractual Life and Intrinsic Value      
Granted (in years) 9 years 7 months 10 days    
Outstanding (in years) 9 years 7 months 10 days 8 years 10 months 6 days  
Outstanding at the end (in dollars) $ 23    
Non-vested shares 35,000    
Unrecognized compensation expense $ 277    
Unrecognized compensation expense, recognition period 4 years 7 months 10 days