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Net Loss Per Share (Tables)

12 Months Ended

Dec. 31, 2012

Computation of Basic and Diluted Earnings Per Share


		December 31,
		2012				2011				2010
Basic and diluted net loss per share (in thousands, except per share amounts):
Numerator:
Net loss		$	(69,949	)		$	(48,597	)		$	(57,308	)

Denominator for basic and diluted net loss per share:
Weighted-average common shares outstanding			170,469				125,101				82,463

Basic and diluted net loss per share		$	(0.41	)		$	(0.39	)		$	(0.69	)


		December 31,
		2012				2011				2010
Outstanding securities not included in diluted net loss per share calculation (in thousands):
Stock options and stock awards			15,561				11,101				7,288
Warrants			12,714				25,729				25,734

			28,275				36,830				33,022