Income Taxes (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Tax Disclosure [Abstract]
Anticpated increase in equity, if deferred tax benefits are recognized	$ 300,000
Deferred tax liabilities from undistributed foreign earnings	500,000
Unrecognized tax benefits	5,726,000	5,025,000	5,111,000	4,842,000
Unrecognized tax benefits that would impact effective tax rate	900,000	200,000	200,000
Unrecognized tax benefits that would not impact effective tax rate	4,800,000	4,800,000	4,900,000
Income tax penalties and tax related interest accrued	200,000	100,000	100,000
Valuation allowance	$ 99,731,000	$ 98,271,000

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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Amount of deferred tax liability attributable to taxable temporary differences from undistributed earnings of subsidiaries and other recognized entities not within the country of domicile of the entity.

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- Definition

This element represents the total of accruals as of the date of the statement of financial position for interest recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity and the amount of statutory penalties for a tax position claimed or expected to be claimed by the entity, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties.

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- Definition

Amount of an unrecognized tax benefit that is directly related to a position taken in a tax year that results in a net operating loss carryforward. This amount is presented as a reduction of the related deferred tax asset in the balance sheet if that deferred tax asset is not used. This amount is presented separately from the deferred tax asset for a net operating loss carryforward if this unrelated tax benefit is associated with a different tax position.

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