Potentially Dilutive Securities

9 Months Ended

Sep. 30, 2015

3. Potentially Dilutive Securities

The Company’s potential dilutive securities, which include unvested stock options and warrants, have been excluded from the computation of diluted net loss per share as the effect of including those securities would be to reduce the net loss per share and be antidilutive. Therefore, the denominator used to calculate both basic and diluted net loss per common share is the same in all periods presented.

The following outstanding potentially dilutive securities have been excluded from the computations of diluted net loss per common share:

	As of September 30,
	2015	2014
Options to purchase common stock	527,120	336,102
Unvested restricted stock units to purchase common stock	3,750	—
ESPP contributions to purchase common stock	375	430
Warrants to purchase common stock	11,067	11,067
	542,312	347,599