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Income Taxes (Details) (USD $)	12 Months Ended			163 Months Ended
Income Taxes (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Income Tax Expense	$ 0	$ 0	$ 0	$ 0
Deferred Tax Valuation Allowance	(23,137,000)	(18,858,000)		(23,137,000)
Change in Deferred Tax Valuation Allowance	4,300,000	3,900,000
Federal Operating Loss Carryforwards	94,500,000			94,500,000
Federal Research Credit Carryforward	$ 2,900,000			$ 2,900,000

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

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

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

The amount of the change in the period in the valuation allowance for a specified deferred tax asset.