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STOCKHOLDERS' EQUITY - Share-Based Compensation (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
STOCKHOLDERS' EQUITY      
Stock-based compensation expense $ 103,932 $ 572,574  
Granted 895,500    
Stock-based compensation options, expiration period 5 years    
Vesting period 1 year    
Fair value of awards, grant date $ 561,237    
Unrecognized compensation expense related to unvested Employee Awards $ 803,599    
Recognition period related to unvested Employee Awards 13 months   15 months
Number of Shares      
Outstanding, beginning of period 7,366,420 12,833,780 12,833,780
Granted 895,500    
Outstanding, end of period     7,366,420
Weighted-average Remaining Contractual Term (in years)      
Outstanding contractual term (in years) 5 years 3 months 18 days   5 years 6 months
Exercisable, end of period 5 years 7 months 6 days    
Aggregate Intrinsic Value      
Outstanding, end of period $ 1,614,000   $ 167,000
Exercisable, end of period $ 868,000