Net Loss Per Share (Tables)

12 Months Ended

Dec. 31, 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 December 31,
	2015		2014		2013
Options to purchase common stock		3,522,813		2,138,096		582,152
Common stock subject to repurchase		23,554		103,252		—
Convertible preferred stock		—		252,817		252,818
Redeemable convertible preferred stock		—		17,236,784		5,482,761
Warrants for preferred stock		—		976,492		1,002,291
Total potential dilutive shares		3,546,367		20,707,441		7,320,022