Income Taxes (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2010	Dec. 31, 2011
Federal And State Net Operating Loss Carryforwards	$ 193,800,000
Operating Loss Carryforwards, Expiration Dates	The net operating loss carryforwards expire in various amounts for federal and state tax purposes through 2032 and 2027, respectively.
Deferred Tax Assets, Operating Loss Carryforwards Federal	141,400,000
Operating Loss Carry Forwards Federal For Next Fiscal Year To Two Years	8,900,000
Operating Loss Carry Forwards Federal For Three Years	7,600,000
Operating Loss Carry Forwards Federal For Four Years and Thereafter	4,100,000
Revenue From Grants		488,000
Deferred Tax Assets, Valuation Allowance	$ 80,285,747		$ 68,519,669