Net Loss Per Share (Tables)

9 Months Ended

Sep. 30, 2016

Earnings Per Share [Abstract]

Schedule of Outstanding Shares of Common Stock Equivalents Excluded from Calculation of Diluted Net Loss Per Share Attributable to Common Stockholders

The following outstanding shares of common stock equivalents were excluded from the calculation of diluted net loss per share attributable to common stockholders for the periods presented because including them would have been antidilutive:

	As of September 30,
	2016		2015
Options to purchase common stock		6,629,163		3,314,159
Common stock subject to repurchase		—		39,493
Total potential dilutive shares		6,629,163		3,353,652