Equity Financing and the Debt Restructuring (2010 Equity Financing and the Debt Restructuring) (Details) (USD $)	3 Months Ended		6 Months Ended				0 Months Ended				0 Months Ended	6 Months Ended				1 Months Ended		0 Months Ended	6 Months Ended				6 Months Ended	0 Months Ended				6 Months Ended		0 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Mar. 31, 2011 Warrants Issued Pursuant to Waiver Agreement [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]	Dec. 24, 2007 Amended and Restated Senior 6.25% Convertible Note [Member]	Jun. 30, 2012 Amended and Restated Senior 6.25% Convertible Note [Member]	Dec. 24, 2010 Unsecured Convertible Note [Member]	Jun. 30, 2013 Unsecured Convertible Note [Member]	Jun. 30, 2012 Unsecured Convertible Note [Member]	Dec. 23, 2009 Unsecured Convertible Note [Member]	Nov. 02, 2006 Unsecured Convertible Note [Member]	Mar. 31, 2011 Unsecured Convertible Note [Member] Warrants Issued for Convertible Note Restructuring [Member]	Nov. 29, 2010 2010 Bridge Loan [Member]	Dec. 24, 2010 2010 Plan [Member]	Jun. 30, 2013 2010 Plan [Member]	Jun. 30, 2012 2010 Plan [Member]	Jun. 30, 2011 2010 Plan [Member]	Mar. 26, 2012 2010 Plan [Member]	Jun. 30, 2011 2010 Plan [Member] Warrants Issued Pursuant to Waiver Agreement [Member]	Dec. 24, 2010 2010 Plan [Member] Minimum [Member]	Dec. 24, 2010 2010 Plan [Member] Maximum [Member]	Apr. 05, 2012 2012 Plan [Member]	Mar. 26, 2012 2012 Plan [Member]	Jun. 30, 2013 2012 Plan [Member]	Jun. 30, 2012 2012 Plan [Member]	Mar. 26, 2012 2012 Plan [Member] Minimum [Member]	Mar. 26, 2012 2012 Plan [Member] Maximum [Member]
Equity Financing and Debt Restructuring [Line Items]
Gross consideration in equity financing transaction																								$ 10,000,000	$ 15,000,000		$ 6,000,000			$ 3,000,000	$ 10,000,000
Shares of stock issued per warrant exercised																		1									0.5
Commission fee percentage																		8.00%									10.00%
Shares of common stock issued											150,000							40,000								616,000	2,000,000
Value of shares issued for agent fees, denominator																		1,000,000
Payments for placement fees																		180,000
Equity units subscribed but unissued																		12,500,000
Per share subscription price of equity units																		$ 1.20
Warrant term length																5 years		5 years
Exercise price of warrants											0.90					0.96		1.00	0.7312			0.78
Proceeds from equity financing			425,000	6,150,000														13,500,000								154,000
Principal issued								5,500,000	15,000,000						1,000,000		1,000,000
Repayments of convertible debt																		2,750,000
Cash paid to settle debt							2,750,000											2,500,000									2,750,000
Number of warrants cancelled																		5,208,333
Number of shares issued for debt restructuring							2,000,000											800,000
Value of shares issued for debt restructuring							760,000																				760,000
Shares of stock issuable, but forgone in lieu of cash payment																		3,500,000
Debt forgiveness																		7,200,000
Debt interest rate									6.25%					8.00%	5.00%
Interest paid			65,700	248,643			680,816	350,434	937,000
Accrued interest payable										203,700																	680,816
Conversion price								$ 1.35							$ 1.50
Warrants issued						400,000					75,000								12,499,980
Stock issued upon exercise of warrants																					372,272
Derivative valuation	1,275,275	4,309,537	1,275,275	4,309,537	1,191,269							34,600	326,400						134,500	750,000								783,715	3,101,537
Gain (loss) on derivative valuation	$ 709,509	$ 2,959,155	$ (25,606)	$ 4,588,480								$ 11,800	$ (26,400)						$ (25,100)	$ 2,125,000			$ 144,000					$ (26,246)	$ 1,659,855
Risk-free interest rate												0.10%							0.51%
Expected life												6 months							2 years 6 months
Expected volatility												143.51%							98.23%
Dividend yield												0.00%							0.00%
Stock trading price												$ 0.08							$ 0.08