Net Loss per Common Share (Tables)

3 Months Ended

Mar. 31, 2016

Earnings Per Share [Abstract]

Schedule of Potentially Dilutive Securities not Included in Calculation of Diluted Per Common Share

Potentially dilutive securities that were not included in the diluted per common share calculations because they would be anti-dilutive were as follows:

	March 31,
	2016		2015
Convertible preferred stock		—		71,976,036
Options to purchase common stock		9,840,242		8,955,011
Convertible preferred stock warrants		—		108,006
Common stock warrants		134,727		1,154,270
Total		9,974,969		82,193,323