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Net Loss Per Share Attributable to Common Stockholders (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Calculation of basic and diluted net loss per common share    
Net loss attributable to common stockholders (basic) $ (32,146,057) $ (21,968,614)
Shares used to compute net loss per common share, basic and diluted 14,681,044 2,895,729
Net loss per share attributable to common stockholders, basic and diluted $ (2.19) $ (7.59)