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STOCKHOLDERS' EQUITY - Restricted Stock (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Stock-based compensation    
Number of shares granted 12,000 987,590
2020 Incentive Plan | Restricted Stock    
Stock-based compensation    
Vesting period 4 years  
Percentage of awards other than options vesting on the annual anniversary date of the grant 25.00%  
Number of shares granted 100,000  
Aggregate grant date fair value of the shares granted $ 0.1  
Unrecognized compensation expense other than options $ 2.2  
Weighted average remaining vesting period 1 year 9 months 18 days  
2020 Incentive Plan | Restricted Stock | Employee    
Stock-based compensation    
Number of shares granted   1,000,000.0
Unrecognized compensation expense other than options   $ 4.1
2020 Incentive Plan | Restricted Stock | Employee | Tranche One    
Stock-based compensation    
Vesting period   4 years
Number of shares granted   400,000
Aggregate average grant date fair value   $ 5.0
2020 Incentive Plan | Restricted Stock | Employee | Tranche Two    
Stock-based compensation    
Number of shares granted   200,000
Aggregate average grant date fair value   $ 2.1
Compensation expense recorded $ 0.0  
2020 Incentive Plan | Restricted Stock | Employee | Tranche Three    
Stock-based compensation    
Number of shares granted   400,000
Aggregate average grant date fair value   $ 2.3
2020 Incentive Plan | Restricted Stock | Non-employee director    
Stock-based compensation    
Weighted average remaining vesting period   2 years 6 months