Net Loss per Share Attributable to Common Stockholders

6 Months Ended

Jun. 30, 2017

Earnings Per Share [Abstract]

Net Loss per Share Attributable to Common Stockholders

9. Net Loss per Share Attributable to Common Stockholders

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 June 30,						Six Months Ended June 30,
	2017			2016			2017			2016
Numerator
Net loss	$	(12,837	)	$	(9,760	)	$	(24,384	)	$	(18,180	)
Net loss attributable to common stockholders, basic and diluted	$	(12,837	)	$	(9,760	)	$	(24,384	)	$	(18,180	)
Denominator
Weighted average shares outstanding		31,446,235			27,023,566			31,437,448			27,024,104
Less: weighted average shares subject to repurchase		(245,462	)		(686,382	)		(286,232	)		(739,474	)
Weighted average shares used to compute basic and diluted net    loss per share		31,200,773			26,337,184			31,151,216			26,284,630
Net loss per share attributable to common stockholders, basic    and diluted	$	(0.41	)	$	(0.37	)	$	(0.78	)	$	(0.69	)

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 June 30,
	2017		2016
Common stock subject to repurchase		219,267		626,810
Stock options to purchase common stock		3,332,142		2,044,636

As of June 30, 2017, the Company has contributions from plan participants of $130,000 under the 2015 ESPP, which if converted, would be equivalent to 11,216 shares based on 85% of the stock price at the beginning of the offering period.