Net Loss Per Share (Tables)

9 Months Ended

Sep. 30, 2016

Summary of Reconciliation of the Denominator Used in the Calculation of Basic and Diluted Loss Per Share

A reconciliation of the denominator used in the calculation of basic and diluted loss per share is as follows (in thousands, except per share amounts):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2016			2015			2016			2015
Numerator:
Net loss attributable to common stockholders	$	(12,317	)	$	(10,212	)	$	(40,646	)	$	(41,488	)
Denominator:
Weighted-average common shares outstanding—basic		28,090			6,456			27,685			6,376
Less: Weighted-average common stock subject to repurchase		(6	)		(75	)		(18	)		(97	)
Total weighted-average common shares outstanding—basic		28,084			6,381			27,667			6,279
Dilutive effect of share equivalents resulting from stock options, unvested restricted stock awards, common stock warrants, common stock subject to repurchase and redeemable convertible preferred stock (as converted)		—			—			—			—
Weighted-average common shares outstanding-diluted		28,084			6,381			27,667			6,279
Net loss per common share, basic and diluted	$	(0.44	)	$	(1.60	)	$	(1.47	)	$	(6.61	)

Summary of Shares Excluded from Calculation of Diluted Loss Per Share with a Potential Dilutive Impact

The following table contains share totals with a potentially dilutive impact (in thousands):

	As of September 30,
	2016		2015
Options to purchase common stock		3,261		3,910
Common stock warrants		17		103
Common stock subject to repurchase		4		65
Redeemable convertible preferred stock (as converted)		—		14,977
Unvested restricted stock awards		—		—
Restricted stock units		1,000		—
Total		4,282		19,055