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

3 Months Ended

Mar. 31, 2013

Earnings Per Share [Abstract]

Calculation of Basic and Diluted Net Income (Loss) Per Share Attributable to Common Stockholders

The following tables present the calculation of basic and diluted net income (loss) per share attributable to common stockholders (in thousands, except share and per share data):

	Three Months Ended March 31,
	2013			2012
Numerator:
Net loss	$	(13,358	)	$	(5,640	)
Accretion of redeemable convertible preferred stock	—			(154		)
Net loss attributable to common stockholders—basic and diluted	$	(13,358	)	$	(5,794	)
Denominator:
Weighted-average shares outstanding—basic and diluted	129,782,029			25,123,582
Net income loss per share attributable to common stockholders:
Basic	$	(0.10	)	$	(0.23	)
Diluted	$	(0.10	)	$	(0.23	)

Summary of Potentially Dilutive Securities

Potentially dilutive securities that are not included in the calculation of diluted net loss per share because doing so would be antidilutive are as follows:

	Three Months Ended March 31,
	2013	2012
Common stock options	30,454,754	36,670,579
Convertible preferred stock	—	83,703,016
Restricted stock units	3,430,343	1,000,000
Common stock subject to repurchase	188,186	726,092
ESPP obligations	265,173	—
Total potentially dilutive securities	34,338,456	122,099,687