Income Taxes (Tables)

12 Months Ended

Dec. 31, 2011

Income Taxes [Abstract]

Loss before provision for income taxes

	Year Ended December 31,
	2011			2010			2009
Domestic	$	(135,880	)	$	(39,321	)	$	(103,295	)
Foreign		2,920			2,264			523
Total	$	(132,960	)	$	(37,057	)	$	(102,772	)

Provision (benefit) for income taxes

	Year Ended December 31,
	2011		2010		2009
Current:
Federal	$	—	$	1	$	(522	)
State		1		2		(28	)
Foreign		921		698		352
Total Current		922		701		(198	)
Deferred:
Federal		—		—		—
State		—		—		—
Foreign		96		180		(55	)
Total Deferred		96		180		(55	)
Provision (benefit) for income taxes	$	1,018	$	881	$	(253	)

Income tax provision (benefit) related to continuing operations

	Year Ended December 31,
	2011			2010			2009
U.S. federal benefit
At statutory rate	$	(46,536	)	$	(12,970	)	$	(35,970	)
State taxes		1			2			(28	)
Change in valuation allowance		48,959			15,123			34,327
Foreign tax differential		(129	)		86			114
Unrecognized tax credits		(893	)		(1,833	)		(882	)
Expiring tax attributes		—			—			1,569
Other		(384	)		473			617
Total	$	1,018		$	881		$	(253	)

Significant components of our deferred tax assets

	December 31,
	2011			2010
Deferred tax assets:
Net operating loss carryforwards	$	342,128		$	318,257
Research and other credits		51,125			49,657
Capitalized research expenses		9,514			5,797
Deferred revenue		48,732			31,411
Property and equipment		8,081			7,654
Reserve and accruals		8,083			5,732
Stock-based compensation		32,268			28,157
Other		3,895			4,275
Deferred tax assets before valuation allowance		503,826			450,940
Valuation allowance for deferred tax assets		(503,689	)		(450,781	)
Total deferred tax assets		137			159
Deferred tax liabilities:
Property and equipment		(75	)		—
Total deferred tax liabilities		(75	)		—
Net deferred tax assets	$	62		$	159

Unrecognized tax benefits

	December 31,
	2011		2010			2009
Beginning balance	$	13,058	$	13,084		$	11,660
Tax positions related to current year Additions:
Federal		297		259			415
State		221		208			318
Reductions		—		—			—
Tax positions related to prior year Additions:
Federal		—		—			—
State		—		—			691
Reductions		—		(493	)		—
Settlements		—		—			—
Lapses in statute of limitations		—		—			—
Ending balance	$	13,576	$	13,058		$	13,084