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Income Taxes (Details Textual) (USD $)	12 Months Ended
Income Taxes (Details Textual) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Taxes (Textual) [Abstract]
Unrecognised tax benefits	$ 2,822,531	$ 2,822,531	$ 2,822,531
US federal tax rate	35.00%
Federal [Member]
Summary of Tax Credit Carry Forward and Operating Loss Carry Forwards [Line Items]
Federal NOL carryforwards	71,662,000
Federal credit carryforward	1,578,000
State [Member]
Summary of Tax Credit Carry Forward and Operating Loss Carry Forwards [Line Items]
State NOL carryforwards	40,373,000
Federal credit carryforward	$ 1,110,000

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

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