Annual report pursuant to Section 13 and 15(d)

STOCK-BASED COMPENSATION - Employee Plans (Details)

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STOCK-BASED COMPENSATION - Employee Plans (Details)
1 Months Ended 12 Months Ended
Jan. 31, 2022
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Sep. 30, 2021
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Jan. 31, 2021
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Dec. 31, 2021
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STOCK-BASED COMPENSATION        
Number of active equity plans | plan       2
Employee stock options        
STOCK-BASED COMPENSATION        
Options exercised during the period (in shares)       1,353,426
2018 Equity Incentive Plan        
STOCK-BASED COMPENSATION        
Additional shares approved     825,000  
2018 Equity Incentive Plan | Maximum        
STOCK-BASED COMPENSATION        
Expiration period       10 years
2018 Equity Incentive Plan | Employee stock options        
STOCK-BASED COMPENSATION        
Number of shares of common stock authorized (in shares)       41,739,675
Inducement Plan        
STOCK-BASED COMPENSATION        
Additional shares approved   469,000    
Inducement Plan | Subsequent event        
STOCK-BASED COMPENSATION        
Additional shares approved 610,000      
Inducement Plan | Employee stock options        
STOCK-BASED COMPENSATION        
Number of shares of common stock authorized (in shares)       1,752,333