Net Loss Per Share (Tables)

3 Months Ended

Mar. 31, 2017

Earnings Per Share [Abstract]

Schedule of Net Loss Per Share, Diluted

The following common stock equivalents were excluded from the calculation of diluted net loss per share for the periods indicated because including them would have had an anti-dilutive effect or the exercise prices were greater than the average market price of the common shares.

	Three Months Ended March 31,
	2017	2016
Stock options	1,717,181	2,420,804
Unvested restricted stock	17,720	35,440
Restricted stock units	—	147,598
Common stock warrants	926,840	926,840
	2,661,741	3,530,682