Net Loss Per Share (Tables)

9 Months Ended

Sep. 30, 2019

Net Loss Per Share Attributable to Common Stockholders

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

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2019		2018		2019		2018
	(unaudited)					(unaudited)
Net loss attributable to common shareholders (basic and diluted)	$	(11,682,949)	$	(6,138,352)	$	(36,707,937)	$	(20,487,172)
Shares used to compute net loss per common share, basic and diluted		5,841,790		162,506		2,746,523		143,012
Net loss per share attributable to common shareholders, basic and diluted	$	(2.00)	$	(37.77)	$	(13.37)	$	(143.25)

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

	September 30,	September 30,
	2019	2018
	(unaudited)
Options issued and outstanding	3,821,690	42,979
Inducement options issued and outstanding	—	2,994
Options available for grant under stock options plans	554,016	3,402
Restricted stock unit awards issued and outstanding	5,613	5,613
Warrants issued and outstanding	19,421,892	16,582
Convertible notes	—	23,469
Series A convertible preferred stock	473,565	—
Series B convertible preferred stock	985,500	—
Total	25,262,276	95,039