Net Loss Per Common Share (Tables)

6 Months Ended

Jun. 30, 2016

Earnings Per Share [Abstract]

Schedule of outstanding shares of common stock equivalents that have been excluded from diluted net loss per common share

The following outstanding common stock equivalents have been excluded from diluted net loss per common share because their inclusion would be anti-dilutive:

	Three Months Ended June 30,		Six Months Ended June 30,
	2016	2015	2016	2015
Shares of common stock subject to outstanding options	5,320,885	4,270,882	4,890,309	3,940,304
Employee stock purchase plan	47,435	—	36,942	—
Total common stock equivalents	5,368,320	4,270,882	4,927,251	3,940,304