Net Loss Per Share (Tables)

6 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

Numerator and Denominator Used in Computing Basic and Diluted Net Loss per Share

The following table provides the numerator and denominator used in computing basic and diluted net loss per share for the periods indicated:

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Numerator:
Net loss	$	(4,102,729	)	$	(5,840,902	)	$	(9,482,676	)	$	(11,657,176	)
Denominator:
Weighted-average shares outstanding-basic and diluted		28,375,379			9,769,322			26,549,895			8,875,177
Net loss per share, basic and diluted	$	(0.14	)	$	(0.60	)	$	(0.36	)	$	(1.31	)

Outstanding Securities Excluded from Computation of Diluted Net Loss per Share

The following outstanding securities were excluded from the computation of diluted net loss per share for the periods presented because their effect would have been anti-dilutive:

	Six Months Ended June 30,
	2018		2017
Options to purchase common stock		1,693,575		1,436,978
Common stock warrants		237,846		219,723
Restricted stock units		26,666		208,999
QNAH convertible note		766,381		—