v3.22.1
STOCKHOLDERS' EQUITY - Restricted Stock (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized      
Stock-based compensation $ 1,526 $ 1,316  
Restricted stock      
Restricted Stock      
Outstanding at period start (in shares) 368,446    
Granted (in shares) 146,425    
Forfeited (in shares) (2,341)    
Vested (in shares) (120,656)    
Outstanding at period end (in shares) 391,874   368,446
Weighted-average remaining contractual terms (in years) 1 year 10 months 24 days   1 year 1 month 6 days
Restricted stock exercisable (in shares) 0    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized      
Unrecognized compensation expense $ 12,443    
Unrecognized compensation expense, weighted average period of recognition (in years) 1 year 10 months 24 days    
Stock-based compensation $ 1,526 $ 1,440