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Summary of Significant Accounting Policies - Net Loss Per Share (Details) - USD ($)
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Numerator:    
Net loss attributable to common shareholders $ (4,094,622) $ (4,179,100)
Net loss used for basic and diluted loss per share $ (4,094,622) $ (4,179,100)
Denominator:    
Weighted-average shares used to compute basic and diluted net loss per share (in shares) 9,910,306 4,086,561
Net loss per share attributable to common stockholders:    
Basic and diluted (in dollars per share) $ (0.41) $ (1.02)