Quarterly report pursuant to Section 13 or 15(d)

STOCK-BASED COMPENSATION - Stock Option Activity (Details)

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STOCK-BASED COMPENSATION - Stock Option Activity (Details) - Stock Option Activity - USD ($)
3 Months Ended
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Outstanding - Number of Shares Issuable Upon Exercise of Outstanding Options 4,701,787 1,392,964 1,184,464  
Granted - Number of Shares Issuable Upon Exercise of Outstanding Options 20,000 3,309,000 208,500  
Expired- Number of Shares Issuable Upon Exercise of Outstanding Options   (177)    
Forfeited - Number of Shares Issuable Upon Exercise of Outstanding Options (46,001)      
Outstanding - Number of Shares Issuable Upon Exercise of Outstanding Options 4,675,786 4,701,787 1,392,964  
Exercisable - Number of Shares Issuable Upon Exercise of Outstanding Options 810,100      
Unvested - Number of Shares Issuable Upon Exercise of Outstanding Options 3,865,686      
Outstanding - Weighted Average Exercise Price (in dollars per share) $ 2.23 $ 3.96 $ 4.34  
Granted - Weighted Average Exercise Price (in dollars per share) 1.06 1.66 1.78  
Expired- Weighted Average Exercise Price (in dollars per share)   2,800.00    
Forfeited - Weighted Average Exercise Price (in dollars per share) 2.01      
Outstanding - Weighted Average Exercise Price (in dollars per share) 2.23 $ 2.23 $ 3.96  
Exercisable - Weighted Average Exercise Price (in dollars per share) 4.87      
Unvested - Weighted Average Exercise Price (in dollars per share) $ 1.68      
Outstanding - Weighted Average Remaining Contracted Term in Years 9 years 18 days 9 years 3 months 21 days 8 years 6 months 21 days  
Exercisable - Weighted Average Remaining Contracted Term in Years 7 years 5 months 12 days      
Unvested - Weighted Average Remaining Contracted Term in Years 9 years 4 months 17 days      
Outstanding - Aggregate Intrinsic Value $ 0   $ 122,700 $ 316,688
Exercisable - Aggregate Intrinsic Value (in dollars) 0      
Unvested - Aggregate Intrinsic Value (in dollars) $ 0