Potentially Dilutive Securities

9 Months Ended

Sep. 30, 2016

4. Potentially Dilutive Securities

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

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

	As of September 30,
	2016		2015
Options to purchase common stock		2,036,117		527,120
Restricted stock units		3,750		3,750
ESPP contributions to purchase common stock		—		375
Warrants to purchase common stock		331,193		11,067
		2,371,060		542,312