Net Loss Per Share Attributable To Common Stockholders (Tables)

9 Months Ended

Sep. 30, 2012

Basic and Diluted Loss Per Share Attributable to Common Stockholders

The following table presents our basic and diluted loss per share attributable to common stockholders (in thousands, except per share amounts):



	For the Three Months Ended						For the Nine Months Ended
	September 30,						September 30,
	2012			2011			2012			2011
Net loss attributable to common stockholders	$	(7,627	)	$	(4,277	)	$	(23,973	)	$	(64,152	)
Weighted-average shares of common stock outstanding	50,163			48,018			49,755			36,868
Net loss per share attributable to common stockholders – basic and diluted	$	(0.15	)	$	(0.09	)	$	(0.48	)	$	(1.74	)

Anti-Dilutive Shares Excluded from Calculation of Diluted Net Loss Per Share

At September 30, 2012 and 2011, anti-dilutive shares excluded from the calculation of diluted net loss per share attributable to common stockholders were (in thousands):



	September 30,
	2012	2011
Options to purchase common stock and restricted stock units	7,059	5,797
Common stock subject to repurchase right	15	35
Common stock warrants	—	375
Shares issued for purchase consideration held in escrow	16	—
Other restricted common stock	31	—
Total shares excluded from net loss per share attributable to common stockholders	7,121	6,207