Net Loss Per Common Share (Tables)

3 Months Ended

Mar. 31, 2018

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
	March 31,
	2018		2017
Outstanding stock options		478,132		1,059,795
Unvested restricted stock		914,648		1,468,022
Total		1,392,780		2,527,817