Net Loss Per Share (Tables)

3 Months Ended

Mar. 31, 2018

Earnings Per Share [Abstract]

Computation of Diluted Weighted-Average Shares Outstanding

The following potentially dilutive securities outstanding have been excluded from the computation of diluted weighted-average shares outstanding, because such securities had an antidilutive impact:

	Three Months ended March 31,
	2018		2017
Options to purchase common stock		3,066,856		2,238,121
Warrants to purchase common stock		60,000		1,384,608
Restricted stock units		253,272		163,902
Total of common stock equivalents		3,380,128		3,786,631