Financing (Details 5) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Face Value, Debentures	$ 53	$ 22,438
Carrying Value, Debentures	53	16,317
Accrued Interest, Debentures	10	7,658
Embedded Conversion Feature, Debentures	2,373	9,171
Common Stock Shares, Debentures (in shares)	1,002,281	3,662,847
Series C Preferred Stock [Member]
Preferred stock	4,840	5,086
Carrying Value, preferredstock	4,840	5,086
Preferred Stock Interest Rate	0	0
Preferred Stock, Embedded Conversion Feature	2,206	554
Common Stock Shares, Converted Preferred Stock (in shares)	273,382	499,084
Series D Preferred Stock [Member]
Preferred stock	348	1,395
Carrying Value, preferredstock	348	1,395
Preferred Stock Interest Rate	0	0
Preferred Stock, Embedded Conversion Feature	159	152
Common Stock Shares, Converted Preferred Stock (in shares)	66,457	136,899
Debentures 2006 Series [Member]
Face Value, Debentures	53	7,061
Carrying Value, Debentures	53	7,061
Accrued Interest, Debentures	10	3,550
Embedded Conversion Feature, Debentures	8	1,554
Common Stock Shares, Debentures (in shares)	11,871	1,128,515
Debentures 2008 Series [Member]
Face Value, Debentures		4,788
Carrying Value, Debentures		4,788
Accrued Interest, Debentures		2,226
Embedded Conversion Feature, Debentures		932
Common Stock Shares, Debentures (in shares)		712,474
Debentures 2009 Series [Member]
Face Value, Debentures		1,983
Carrying Value, Debentures		1,965
Accrued Interest, Debentures		736
Embedded Conversion Feature, Debentures		370
Common Stock Shares, Debentures (in shares)		278,427
Debentures 2010 Series [Member]
Face Value, Debentures		3,881
Carrying Value, Debentures		1,426
Accrued Interest, Debentures		770
Embedded Conversion Feature, Debentures		2,692
Common Stock Shares, Debentures (in shares)		470,718
Debentures 2011 Series [Member]
Face Value, Debentures		4,725
Carrying Value, Debentures		1,077
Accrued Interest, Debentures		376
Embedded Conversion Feature, Debentures		$ 2,917
Common Stock Shares, Debentures (in shares)		436,730