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

12 Months Ended

Dec. 31, 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:

	Year Ended December 31,
	2013		2012		2011
Convertible preferred stock	–			24,026,797		24,026,797
Stock options to purchase common stock		3,708,773		1,653,298		962,225
Convertible preferred stock warrants	–			81,075		81,075
Common stock warrants		82,575		1,500		1,500

Computation of Basic and Diluted Net Loss Per Share

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

	Year Ended December 31,
	2013			2012			2011
Net income (loss)	$	(83,352	)	$	11,366		$	19,984
Noncumulative dividends on convertible preferred stock	–				(11,366	)		(18,757	)
Undistributed earnings allocated to participating securities	–			–				(1,148	)
Net income (loss) attributable to common stockholders, basic		(83,352	)		-			79
Adjustment to undistributed earnings allocated to participating securities	–				-			48
Net income (loss) attributable to common stockholders, diluted	$	(83,352	)	$	-		$	127
Shares used in computing net income (loss) per share attributable to common stockholders, basic		22,842,443			1,350,939			1,249,778
Dilutive effect of common stock options	–				697,928			839,428
Shares used in computing net income (loss) per share attributable to common stockholders, diluted		22,842,443			2,048,867			2,089,206
Net income (loss) per share attributable to common stockholders:
Basic	$	(3.65	)	$	-		$	0.06
Diluted	$	(3.65	)	$	-		$	0.06