Income Taxes (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of deferred tax assets and liabilities

Deferred income taxes reflect the net effect of temporary differences between the financial reporting carrying amounts of assets and liabilities and income tax carrying amounts of assets and liabilities. The components of the Company's deferred tax assets and liabilities, all of which are long-term, are as follows (in thousands):

	December 31,
	2012			2011
Deferred tax assets:
Net operating loss carryforwards	$	60,184		$	56,025
Tax credit carryforwards		15,514			10,040
Equipment, furnishings and other		9,822			9,154

Total deferred tax assets		85,520			75,219
Deferred tax liabilities		(100	)		(3,868	)
Net deferred tax assets		85,420			71,351
Valuation allowance		(85,420	)		(71,351	)
	$	—		$	—

Schedule of effective income tax rate reconciliation

The provision for income taxes differs from the provision computed by applying the Federal statutory rate to net loss before income taxes as follows (in thousands):

	Years ended December 31,
	2012			2011			2010
Federal benefit at statutory rate	$	(6,107	)	$	(4,996	)	$	139
State income taxes, net of Federal taxes		(745	)		(857	)		24
State credits		(1,555	)
Warrant liabilities		941
Other permanent differences		(23	)		6			22
Book gain in excess of tax gain		—			—			(3,630	)
Provision related to change in valuation allowance		14,069			16,235			3,278
Other, net		(6,578	)		(10,290	)		167
	$	2		$	98		$	0