Notes Payable (Unsecured Convertible Note) (Details) (USD $)	3 Months Ended		6 Months Ended			0 Months Ended	6 Months Ended	12 Months Ended		0 Months Ended	1 Months Ended		0 Months Ended		1 Months Ended	3 Months Ended		6 Months Ended			1 Months Ended	0 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Dec. 03, 2008 Class A Warrant [Member]	Jun. 30, 2013 Class A Warrant [Member]	Dec. 31, 2008 Class A Warrant [Member]	Dec. 31, 2007 Class A Warrant [Member]	Dec. 03, 2008 Class B Warrant [Member]	Oct. 31, 2007 Class B Warrant [Member]	Sep. 25, 2006 Letter of Understanding [Member]	Dec. 24, 2010 Unsecured Convertible Note [Member]	Dec. 23, 2009 Unsecured Convertible Note [Member]	Mar. 31, 2011 Unsecured Convertible Note [Member]	Jun. 30, 2013 Unsecured Convertible Note [Member]	Jun. 30, 2012 Unsecured Convertible Note [Member]	Jun. 30, 2013 Unsecured Convertible Note [Member]	Jun. 30, 2012 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. 02, 2006 Unsecured Convertible Note [Member] Class A Warrant [Member]	Nov. 02, 2006 Unsecured Convertible Note [Member] Class B Warrant [Member]	Nov. 02, 2006 Unsecured Convertible Note [Member] Class C Warrant [Member]	Nov. 02, 2006 Unsecured Convertible Note [Member] Class D Warrant [Member]
Convertible notes
Amount of credit facility												$ 1,000,000
Principal issued																				1,000,000
Debt interest rate														8.00%						5.00%
Debt maturity date													Dec. 31, 2013	Dec. 22, 2010
Conversion price																				$ 1.50
Number of shares of common stock warrants can be exercised for																				5,500,000	221,758	750,000	750,000	2,000,000	2,000,000
Warrant term length																					5 years	1 year	1 year	18 months	24 months
Exercise price of warrants													0.90								0.96	1.60	1.75	2.10	3.00
Warrants exercised								64,400	454,000
Warrants expired			448,094			231,600				750,000
Shares of common stock issued											650,000		150,000
Number of shares issued for interest															135,369
Common stock issued for interest															81,221
Derivative valuation	1,275,275	4,309,537	1,275,275	4,309,537	1,191,269											34,600	326,400	34,600	326,400
Gain (loss) on derivative valuation	709,509	2,959,155	(25,606)	4,588,480														11,800	(26,400)
Risk-free interest rate							1.41%											0.10%
Expected life							4 years 8 months 12 days											6 months
Expected volatility							91.50%											143.51%
Dividend yield							0.00%											0.00%
Stock trading price							$ 0.08									$ 0.08		$ 0.08
Accretion of discount on convertible notes payable			793,865	265,636												20,000	83,334	83,334	166,668
Interest expense of convertible debt																$ 83,334	$ 20,000	$ 20,000	$ 40,000