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Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Income taxes
Income tax expense	$ 210	$ 239	$ 720	$ 993
Deferred tax assets, federal net operating loss carry forwards	75,215		75,215
Deferred tax assets, state operating loss carryforwards	29,373		29,373
Internal Revenue Service (IRS)
Income taxes
Tax credit carry forward	2,726		2,726
State
Income taxes
Tax credit carry forward	$ 389		$ 389

- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible domestic operating loss carryforwards. Excludes state and local operating loss carryforwards.

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- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible state and local operating loss carryforwards.

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- Definition

The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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- Definition

The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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