Financing (Details 6) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Debt Conversion [Line Items]
Face Value	$ 28,136	$ 28,887
Fair Value	82,906	64,292
Common Stock Shares	118,758,798	22,696,138
Debentures 2006 Series [Member]
Debt Conversion [Line Items]
Face Value	6,493	6,180
Fair Value	18,926	14,758
Common Stock Shares	27,030,155	5,196,283
Debentures 2007 Series [Member]
Debt Conversion [Line Items]
Face Value	7,373	6,856
Fair Value	22,423	17,172
Common Stock Shares	32,303,705	6,098,480
Debentures 2008 Series [Member]
Debt Conversion [Line Items]
Face Value	6,308	6,468
Fair Value	21,825	15,492
Common Stock Shares	31,327,015	5,487,497
Debentures 2009 Series [Member]
Debt Conversion [Line Items]
Face Value	1,062	1,644
Fair Value	3,548	3,565
Common Stock Shares	5,004,868	1,243,390
Debentures 2010 Series [Member]
Debt Conversion [Line Items]
Face Value	3,806	3,806
Fair Value	9,691	7,178
Common Stock Shares	13,786,842	2,512,724
Debentures 2011 Series [Member]
Debt Conversion [Line Items]
Face Value	1,551	1,954
Fair Value	3,194	3,080
Common Stock Shares	4,581,445	1,084,237
Debentures 2012 Series [Member]
Debt Conversion [Line Items]
Face Value	1,543	1,979
Fair Value	$ 3,299	$ 3,047
Common Stock Shares	4,724,768	1,073,527