Financing (Details 5) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Face Value, Debentures	$ 304	$ 22,438
Carrying Value, Debentures	304	16,317
Accrued Interest, Debentures	36	7,658
Embedded Conversion Feature, Debentures	3,409	9,171
Common Stock Shares, Debentures (in shares)	794,392	3,662,847
Series C Preferred Stock [Member]
Face Value Preferred stock	4,840	5,086
Carrying Value, preferredstock	4,840	5,086
Preferred Stock Interest Rate	0	0
Preferred Stock, Embedded Conversion Feature	3,124	554
Common Stock Shares, Converted Preferred Stock (in shares)	273,382	499,084
Series D Preferred Stock [Member]
Face Value Preferred stock	348	1,395
Carrying Value, preferredstock	348	1,395
Preferred Stock Interest Rate	0	0
Preferred Stock, Embedded Conversion Feature	203	152
Common Stock Shares, Converted Preferred Stock (in shares)	245,162	136,899
Debentures 2006 Series [Member]
Face Value, Debentures	304	7,061
Carrying Value, Debentures	304	7,061
Accrued Interest, Debentures	36	3,550
Embedded Conversion Feature, Debentures	82	1,554
Common Stock Shares, Debentures (in shares)	51,585	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	1,778	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	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	3,766	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