Net Loss Per Share (Tables)

6 Months Ended

Jun. 30, 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 June 30,		Six Months Ended June 30,
	2017	2016	2017	2016
Stock options	1,965,206	2,205,774	1,965,206	2,205,774
Unvested restricted stock	13,290	31,010	13,290	31,010
Restricted stock units	—	77,133	—	77,133
Common stock warrants	926,840	926,840	926,840	926,840
	2,905,336	3,240,757	2,905,336	3,240,757