Net Loss Per Share (Tables)

6 Months Ended

Jun. 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 June 30,						Six Months Ended June 30,
	2017			2016			2017			2016
Numerator:
Net loss	$	(5,840,902	)	$	(6,851,603	)	$	(11,657,176	)	$	(13,878,027	)
Denominator:
Weighted-average shares outstanding-basic and diluted		9,769,322			7,018,502			8,875,177			6,952,012
Net loss per share, basic and diluted	$	(0.60	)	$	(0.98	)	$	(1.31	)	$	(2.00	)

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:

	Six Months Ended June 30,
	2017		2016
Options to purchase common stock		1,436,978		1,055,831
Common stock warrant		219,723		219,723
Restricted stock units		208,999		24,999