Notes Payable (Senior 6.25% Convertible Note) (Details) (USD $)	12 Months Ended		1 Months Ended		1 Months Ended	0 Months Ended				1 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 24, 2007 Warrants Issued to Senior Secured Note Holder [Member]	Jul. 30, 2010 Warrants Issued to Senior Secured Note Holder [Member]	Dec. 24, 2007 Warrants Issued to Third Party For Financing Fees [Member]	Mar. 26, 2012 Amended and Restated Senior 6.25% Convertible Note [Member]	Dec. 24, 2010 Amended and Restated Senior 6.25% Convertible Note [Member]	Jul. 30, 2010 Amended and Restated Senior 6.25% Convertible Note [Member]	Mar. 26, 2010 Amended and Restated Senior 6.25% Convertible Note [Member]	Dec. 24, 2007 Amended and Restated Senior 6.25% Convertible Note [Member]	Dec. 31, 2012 Amended and Restated Senior 6.25% Convertible Note [Member]	Oct. 29, 2010 Amended and Restated Senior 6.25% Convertible Note [Member]
Convertible notes
Principal issued							$ 5,500,000			$ 15,000,000
Debt maturity date										Dec. 21, 2013
Debt interest rate										6.25%
Number of shares of common stock notes are convertible into										2,752,294
Conversion price							$ 1.35	$ 1.80		$ 5.45
Number of shares of common stock warrants can be exercised for			1,875,000	5,208,333	112,500
Exercise price of warrants			5.00	1.80	3.75
Shares of common stock issued								2,000,000	1,000,000	1,000,000
Value of shares of common stock issued		2,107,834							990,000	3,750,000
Payments for commissions, finders fees and other transaction expenses										1,377,000
Debt Instrument, periodic interest payment										234,375
Warrant term length			5 years		3 years
Fair value of warrants			3,750,000		252,000
Number of shares issuable, contingent to equity raised								800,000
Payments for debt extinguishment costs		275,041				275,041
Number of warrants cancelled							5,208,333
Value of shares issued for debt restructuring						760,000
Number of shares issued for debt restructuring						2,000,000	800,000
Shares of stock issuable, but forgone in lieu of cash payment							3,500,000
Funding threshold								6,000,000	6,000,000			8,000,000
Proceeds received from equity financing												2,500,000
Required cash balance								950,000	1,250,000
Cash paid to settle debt						2,750,000	2,750,000
Debt forgiveness							7,200,000
Gain on troubled debt restructuring							3,062,457
Interest paid	66,700	347,902				680,816	350,434			937,000
Repayments of convertible debt							2,500,000
Gain on extinguishment of debt		1,578,914				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	1,242,459	8,829,748									203,700
Derivative valuation	11,736	1,191,269									81,500
Accrued interest payable											$ 680,816