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STOCK-BASED COMPENSATION (Details) - USD ($)
$ / shares in Units, $ in Thousands
9 Months Ended 12 Months Ended
Nov. 07, 2018
Dec. 31, 2018
Dec. 31, 2020
Dec. 31, 2019
Oct. 31, 2018
STOCK-BASED COMPENSATION          
Stock compensation expense   $ 373 $ 2,110 $ 1,888  
Total unrecognized compensation expense, expected to be recognized     $ 2,760    
Unrecognized compensation expense, weighted average period in which expected to be recognized     1 year 6 months    
Time-Based Stock Options | Employees          
STOCK-BASED COMPENSATION          
Granted     221,941 472,253  
Equity incentive plan          
STOCK-BASED COMPENSATION          
Authorized         6,985,533
Available for grant     988,383    
Stock option exercise price range, lower limit     $ 5.30    
Stock option exercise price range, upper limit     $ 18.02    
Equity incentive plan | Employees          
STOCK-BASED COMPENSATION          
Granted 5,827,511        
Equity incentive plan | Employees | Time based vesting          
STOCK-BASED COMPENSATION          
Vesting percentage 38.50%        
Equity incentive plan | Employees | Performance based vesting          
STOCK-BASED COMPENSATION          
Vesting percentage 61.50%        
Equity incentive plan | Time-Based Stock Options          
STOCK-BASED COMPENSATION          
Vesting percentage     25.00% 25.00%  
Vesting percentage each year over four years 25.00%