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STOCK-BASED COMPENSATION PLANS - Fair value of stock option grants (Details) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
STOCK-BASED COMPENSATION PLANS        
Expected term (years)     3 years  
Risk-free interest rate     2.81%  
Expected volatility     73.28%  
Number of Shares, Granted 200,000 0 200,000 0