Net Loss per Share Attributable to Common Stockholders (Tables)

3 Months Ended

Mar. 31, 2018

Earnings Per Share [Abstract]

Computation of Basic and Diluted Net Loss per Share

The following table sets forth the computation of basic and diluted net loss per share attributable to common stockholders (in thousands, except share and per share amounts):

	Three Months Ended March 31,
	2018			2017
				As Revised (Note 2)
Numerator:
Net loss	$	(17,820	)	$	(14,762	)
Net loss attributable to common stockholders, basic and diluted	$	(17,820	)	$	(14,762	)
Denominator:
Weighted average shares outstanding		35,889,835			31,428,564
Less: weighted average shares subject to repurchase		(62,600	)		(339,254	)
Weighted average shares used to compute basic and diluted net    loss per share		35,827,235			31,089,310
Net loss per share attributable to common stockholders, basic    and diluted	$	(0.50	)	$	(0.47	)

Summary of Potentially Dilutive Securities Excluded from Computation of Diluted Net Loss per Share

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

	As of March 31,
	2018		2017
Common stock subject to repurchase		51,767		298,915
Stock options to purchase common stock		3,793,364		3,183,304