Net Loss Per Common Share (Tables)

9 Months Ended

Sep. 30, 2017

Earnings Per Share [Abstract]

Potential Common Stock Equivalents Excluded from Calculation of Diluted Net Loss Per Common Share

The following potential common stock equivalents were not included in the calculation of diluted net loss per common share because the inclusion thereof would be antidilutive.

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
Outstanding stock options		849,953		1,303,007		849,953		1,303,007
Unvested restricted stock		1,386,942		1,473,483		1,386,942		1,473,483
Total		2,236,895		2,776,490		2,236,895		2,776,490