Potentially Dilutive Securities

6 Months Ended

Jun. 30, 2019

Potentially Dilutive Securities

Potentially Dilutive Securities

5. Potentially Dilutive Securities

The Company’s potentially 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 June 30,
	2019		2018
Options to purchase common stock		15,139,374		15,651,023
Warrants to purchase common stock		331,193		331,193
		15,470,567		15,982,216