Net Loss Per Share (Tables)

9 Months Ended

Sep. 30, 2015

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,
	2015		2014
Options to purchase common stock		3,314,159		2,386,507
Common stock subject to repurchase		39,493		—
Convertible preferred stock		—		252,818
Redeemable convertible preferred stock		—		17,236,784
Warrants for preferred stock		—		984,529
Total potential dilutive shares		3,353,652		20,860,638