Net Loss per Share Attributable to Common Stockholders

12 Months Ended

Dec. 31, 2015

Earnings Per Share [Abstract]

Net Loss per Share Attributable to Common Stockholders

9. Net Loss per Share Attributable to Common Stockholders

The following table sets forth the potential common shares excluded from the calculation of net loss per common share attributable to common stockholders because their inclusion would be anti-dilutive:

	December 31,
	2015		2014
Options to purchase common stock		3,323,761		3,000,264
Common stock underlying Series A and Series A-1 convertible preferred stock		—		16,300,969
Warrants to purchase common stock		25,569,615		4,615
Total		28,893,376		19,305,848