Net Loss Per Share (Tables)

9 Months Ended

Sep. 30, 2017

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 presented:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2017			2016			2017			2016
Numerator:
Net loss	$	(5,380,846	)	$	(6,488,442	)	$	(17,038,022	)	$	(20,366,469	)
Denominator:
Weighted-average shares outstanding-basic and diluted		11,603,617			7,053,010			9,794,651			6,985,924
Net loss per share, basic and diluted	$	(0.46	)	$	(0.92	)	$	(1.74	)	$	(2.92	)

Outstanding Options and Warrants Excluded from Computation of Diluted Net Loss per Share

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

	Nine Months Ended September 30,
	2017		2016
Options to purchase common stock		1,532,979		1,200,644
Common stock warrant		219,723		219,723
Restricted stock units		34,999		350,499