Net Loss per Common Share (Tables)

12 Months Ended

Dec. 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:

	December 31,
	2016		2015		2014
Convertible preferred stock		—		—		69,608,339
Options to purchase common stock		10,690,156		9,931,229		5,970,382
Convertible preferred stock warrants		—		—		108,006
Common stock warrants		97,621		929,437		1,154,270
Restricted stock awards		657,200		—		—
Total		11,444,977		10,860,666		76,840,997