Notes Payable (Senior 6.25% Convertible Note) (Details) (USD $)	3 Months Ended			0 Months Ended			3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012	Mar. 26, 2012 Amended and Restated Senior 6.25% Convertible Note [Member]	Dec. 24, 2010 Amended and Restated Senior 6.25% Convertible Note [Member]	Dec. 24, 2007 Amended and Restated Senior 6.25% Convertible Note [Member]	Mar. 31, 2012 Amended and Restated Senior 6.25% Convertible Note [Member]
Convertible notes
Principal issued					$ 5,500,000	$ 15,000,000
Debt maturity date						Dec. 21, 2010
Debt interest rate						6.25%
Conversion price					$ 1.35
Payments for debt extinguishment costs		275,041		275,041
Value of shares issued for debt restructuring				760,000
Number of shares issued for debt restructuring				2,000,000
Cash paid to settle debt				2,750,000
Interest paid	400	189,161		680,816	350,434	937,000
Gain (loss) on extinguishment of debt	69,087	1,672,575		2,173,033
Number of shares issued for agent fees				586,164
Value of shares issued for agent fees				222,742
Gain on derivative valuation	(735,115)	1,629,325					203,700
Derivative valuation	$ 1,984,784		$ 1,191,269				$ 81,500