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NET LOSS PER SHARE - Computation of loss per Share (Details) - USD ($)
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Numerator:    
Net loss $ (6,485,644) $ (5,318,925)
Denominator:    
Weighted average common shares outstanding 46,084,383 45,465,754
Net loss per share data:    
Basic and diluted $ (0.14) $ (0.12)