Financing (Details 5) (USD $) Share data in Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Face Value, Debentures	$ 53,000	$ 22,438,000
Carrying Value, Debentures	53,000	16,317,000
Accrued Interest, Debentures	7,000	7,658,000
Embedded Conversion Feature, Debentures	2,147,000	9,171,000
Common Stock Shares, Debentures (in shares)	1,002,281	3,662,847
Series C Preferred Stock [Member]
Preferred stock	4,840,000	5,086,000
Carrying Value, preferredstock	4,840,000	5,086,000
Preferred Stock Interest Rate	0	0
Preferred Stock, Embedded Conversion Feature	1,988,000	554,000
Common Stock Shares, Converted Preferred Stock (in shares)	273,382	245,162
Series D Preferred Stock [Member]
Preferred stock	348,000	1,395,000
Carrying Value, preferredstock	348,000	1,395,000
Preferred Stock Interest Rate	0	0
Preferred Stock, Embedded Conversion Feature	143,000	152,000
Common Stock Shares, Converted Preferred Stock (in shares)	66,457	136,899
Debentures 2006 Series [Member]
Face Value, Debentures	53,000	7,061,000
Carrying Value, Debentures	53,000	7,061,000
Accrued Interest, Debentures	7,000	3,550,000
Embedded Conversion Feature, Debentures	16,000	1,554,000
Common Stock Shares, Debentures (in shares)	11,871	1,128,515
Debentures 2008 Series [Member]
Face Value, Debentures		4,788,000
Carrying Value, Debentures		4,788,000
Accrued Interest, Debentures		2,226,000
Embedded Conversion Feature, Debentures		932,000
Common Stock Shares, Debentures (in shares)		712,474
Debentures 2009 Series [Member]
Face Value, Debentures		1,983,000
Carrying Value, Debentures		1,965,000
Accrued Interest, Debentures		736,000
Embedded Conversion Feature, Debentures		370,000
Common Stock Shares, Debentures (in shares)		278,427
Debentures 2010 Series [Member]
Face Value, Debentures		3,881,000
Carrying Value, Debentures		1,426,000
Accrued Interest, Debentures		770,000
Embedded Conversion Feature, Debentures		2,692,000
Common Stock Shares, Debentures (in shares)		470,718
Debentures 2011 Series [Member]
Face Value, Debentures		4,725,000
Carrying Value, Debentures		1,077,000
Accrued Interest, Debentures		376,000
Embedded Conversion Feature, Debentures		$ 2,917,000
Common Stock Shares, Debentures (in shares)		436,730