Net Loss Per Share Attributable to Common Stockholders (Tables)

12 Months Ended

Dec. 31, 2018

Net Loss Per Share Attributable to Common Stockholders

Schedule of calculation of basic and diluted net income (loss) per common share

	Years Ended December 31,
	2018		2017
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)

Schedule of common stock equivalents excluded from the calculation of diluted net loss per common share

	December 31,	December 31,
	2018	2017
Options issued and outstanding	2,944,148	3,444,663
Warrants to purchase common stock	2,427,653	4,820,025
Restricted stock units	392,904	5,893,849
Total	5,764,705	14,158,537