Convertible Notes and Warrants (Details 2) (USD $)	0 Months Ended	1 Months Ended	3 Months Ended		9 Months Ended					3 Months Ended	9 Months Ended								0 Months Ended		1 Months Ended	3 Months Ended		9 Months Ended
	Jan. 16, 2013	Feb. 22, 2013	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 18, 2013	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2013 2011 Warrant Liabilities	Sep. 30, 2013 2011 Warrant Liabilities	Sep. 18, 2013 2011 Warrant Liabilities	Feb. 22, 2013 2011 Warrant Liabilities	Jan. 16, 2013 2011 Warrant Liabilities	Dec. 31, 2012 2011 Warrant Liabilities	Sep. 30, 2012 2011 Warrant Liabilities	Dec. 31, 2011 2011 Warrant Liabilities	Sep. 18, 2013 2011 Warrant Liabilities February 2013 Amendment and Waiver Agreement	Feb. 22, 2013 2011 Convertible Notes	Feb. 22, 2011 2011 Convertible Notes	Feb. 22, 2013 2011 Convertible Notes	Sep. 30, 2013 2011 Convertible Notes	Sep. 30, 2012 2011 Convertible Notes	Sep. 30, 2013 2011 Convertible Notes	Sep. 30, 2012 2011 Convertible Notes	Sep. 18, 2013 2011 Convertible Notes	Jan. 16, 2013 2011 Convertible Notes	Dec. 31, 2012 2011 Convertible Notes	Dec. 31, 2011 2011 Convertible Notes
Convertible Notes and Warrants
Allocation of initial proceeds	$ 250,000					$ 1,000,000														$ 3,208,000
Debt discount to be amortized																				792,000
Amortization of debt discount		95,000			158,000	215,000													38,000		38,000		67,000		198,000
Impact to other income (expense)			1,620,000	(757,000)	3,485,000	(4,218,000)																1,227,000	747,000	1,475,000	(2,715,000)
Total Liabilities	12,592,000	17,490,000	12,245,000	15,876,000	12,245,000	15,876,000	13,537,000	11,898,000	6,927,000	538,000	538,000	1,048,000	3,916,000	2,000,000	2,000,000	3,200,000	1,600,000	538,000	6,070,000		6,070,000	4,190,000	8,240,000	4,190,000	8,240,000	4,920,000	6,510,000	6,510,000	5,327,000
Impact to other income (expense)			1,078,000	(1,117,000)	3,192,000	(3,517,000)				857,000	(955,000)
Write off of debt discount																			265,000
2011 Convertible Notes converted																						456,000		756,000
Shares issued on conversion of 2011 Convertible Notes																						6,427,000		9,427,000
Amount of shares issued on conversion of 2011 Convertible Notes					883,000																	433,000		833,000
Warrants exercised (in shares)										18,236,853	47,322,376
Shares of common stock issued on conversion of warrants										8,913,000	19,608,926
Cashless exercise of warrants					$ 2,655,000					$ 652,000	$ 2,405,000