Net Income (Loss) per Share Attributable to Common Stockholders (Tables)

9 Months Ended

Sep. 30, 2013

Outstanding Shares of Common Stock Equivalents Excluded from Computation of Diluted Net Loss

The following outstanding shares of common stock equivalents were excluded from the computation of diluted net income (loss) per share attributable to common stockholders for the periods presented because including them would have been antidilutive:

	ThreeMonthsEndedSeptember30,				NineMonthsEndedSeptember30,
	2013		2012		2013		2012
Convertible preferred stock		—		24,026,797		—		24,026,797
Common stock subject to repurchase		750		—		750		—
Stock options to purchase common stock		3,780,358		1,678,800		3,780,358		1,605,305
Preferred stock warrants		—		81,075		—		81,075
Common stock warrants		82,575		1,500		82,575		1,500

Computation of Basic and Diluted Net Loss Per Share

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

	ThreeMonthsEndedSeptember30,								NineMonthsEndedSeptember30,
	2013				2012					2013				2012
Net income (loss)	$	(18,550	)	$		(11,488	)	$			(58,290	)	$		25,148
Noncumulative dividends on convertible preferred stock		—				—					—				(19,065	)
Undistributed earnings allocated to participating securities		—				—					—				(5,761	)
Net income (loss) attributable to common stockholders, basic		(18,550	)			(11,488	)				(58,290	)			322
Adjustment to undistributed earnings allocated to participating securities		—				—					—				140
Net income (loss) attributable to common stockholders, diluted	$	(18,550	)	$		(11,488	)	$			(58,290	)	$		462
Basic shares:
Weighted average common shares outstanding		35,200,761				1,370,190					17,218,475				1,342,919
Diluted shares:
Weighted average common shares outstanding		35,200,761				1,370,190					17,218,475				1,342,919
Weighted average effect of dilutive stock options		—				—					—				633,699
		35,200,761				1,370,190					17,218,475				1,976,618
Net income (loss) per share attributable to common stockholders:
Basic	$	(0.53	)	$		(8.38	)	$			(3.39	)	$		0.24
Diluted	$	(0.53	)	$		(8.38	)	$			(3.39	)	$		0.23