Net Loss Per Share (Tables)

12 Months Ended

Dec. 31, 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 December 31,
	2016		2015		2014
Options to purchase common stock		6,543,654		3,522,813		2,138,096
Common stock subject to repurchase		—		23,554		103,252
Convertible preferred stock		—		—		252,817
Redeemable convertible preferred stock		—		—		17,236,784
Warrants for preferred stock		—		—		976,492
Total potential dilutive shares		6,543,654		3,546,367		20,707,441