Net Loss per Common Share (Tables)

9 Months Ended

Sep. 30, 2015

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 September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
Outstanding stock options		1,825,633		2,718,335		1,825,633		2,718,335
Unvested restricted stock		945,276		365,741		945,276		365,741
Total		2,770,909		3,084,076		2,770,909		3,084,076