Income Tax Expense (Narrative) (Details) (USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Valuation Allowance	$ 50,866,000	$ 50,144,000
U.S. Federal statutory rate to net income (loss) before taxes	34.00%
Operating loss carryforwards	150,000,000	117,200,000
Deferred tax asset related to compensation benefits as well as Federal and State net operating loss carryforwards	5,900,000
Income tax penalties and accrued interest	14,000	0
Unrecognized tax benefits	122,000	0
Research Tax Credit Carryforward \| Internal Revenue Service (IRS)
Operating Loss Carryforwards [Line Items]
Tax credit carryforward amount	4,300,000
Research Tax Credit Carryforward \| State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Tax credit carryforward amount	$ 2,700,000

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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The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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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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- 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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