Income Taxes (Tables)

12 Months Ended

Dec. 31, 2012

Income Taxes [Abstract]

Components of The Income Tax Provision (Benefit)

	2012		2011		2010
Current U.S.	$	-	$	-	$	-
Current foreign		-		412		-
Deferred		-		―		(450	)
Net provision	$	-	$	412	$	(450	)

Deferred Tax Assets (Liabilities)

	2012			2011
Net operating losses	$	122,731		$	116,492
Research tax credits		5,693			5,904
Other		7,326			3,974
Total deferred tax assets		135,750			126,370
Other		(335	)		(350	)
Total deferred tax liabilities		(335	)		(350	)
Net deferred tax assets		135,415			126,020
Less valuation allowance		(135,415	)		(126,020	)
Deferred tax assets, net	$	-		$	-

Tax Rate Differences

	2012			2011			2010
Statutory federal tax rate		(34	)%		(34	)%		(34	)%
State income taxes, net of federal benefit		(8	)%		(9	)%		(4	)%
Research and development and other tax credits		0	%		(5	)%		(2	)%
Expiration of net operating losses		6	%		10	%		4	%
Other		3	%		(3	)%		(1	)%
Change in valuation allowance		33	%		43	%		36	%
		0	%		2	%		(1	)%

Tax Return Reported Federal Net Operating Losses and Tax Credits Available

	Amount
Federal net operating losses expiring through the year 2032	$	302,394
Research tax credits expiring through the year 2032		6,238
Alternative-minimum tax credit (no expiration)		94

Reconciliation of Unrecognized Tax Benefits

	Amount
Unrecognized tax benefits as of January 1, 2011	$	4,910
Gross increases - tax positions in prior period		―
Gross decreases - tax positions in prior period		(35	)
Gross increases - current-period tax positions		-
Increases (decreases) from settlements		-
Unrecognized tax benefits as of December 31, 2011	$	4,875
Gross increases - tax positions in prior period		-
Gross decreases - tax positions in prior period		(74	)
Gross increases - current-period tax positions		-
Increases (decreases) from settlements		-
Unrecognized tax benefits as of December 31, 2012	$	4,801