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STOCKHOLDERS' EQUITY - Stock Options (Details) - Stock options
$ in Millions
3 Months Ended
Mar. 31, 2022
USD ($)
shares
Mar. 31, 2021
USD ($)
shares
Stock-based compensation    
Vesting period 4 years  
Expiration term 7 years  
Unrecognized compensation expense stock option | $ $ 0.3 $ 0.8
Weighted average remaining vesting period 1 year 4 months 24 days 1 year 10 months 24 days
2020 Incentive Plan    
Stock-based compensation    
Percentage of awards vesting on the annual anniversary date of the grant 25  
Granted (in shares) | shares 0 0