Financing (Details 5) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Debt Conversion [Line Items]
Gain (loss) from change in fair value of derivative liability	$ (1,849)	$ 75,351	$ (2,149)	$ (14,298)
Series C Preferred Stock [Member]
Debt Conversion [Line Items]
Gain (loss) from change in fair value of derivative liability	(1,700)	11,915	(1,989)	(3,202)
Series D Preferred Stock [Member]
Debt Conversion [Line Items]
Gain (loss) from change in fair value of derivative liability	(123)	1,946	(144)	(1,346)
Debentures 2006 Series [Member]
Debt Conversion [Line Items]
Gain (loss) from change in fair value of derivative liability	(26)	18,815	(16)	(3,070)
Debentures 2008 Series [Member]
Debt Conversion [Line Items]
Gain (loss) from change in fair value of derivative liability	0	13,391	0	(1,350)
Debentures 2009 Series [Member]
Debt Conversion [Line Items]
Gain (loss) from change in fair value of derivative liability	0	4,964	0	(486)
Debentures 2010 Series [Member]
Debt Conversion [Line Items]
Gain (loss) from change in fair value of derivative liability	0	11,901	0	(34)
Debentures 2011 Series [Member]
Debt Conversion [Line Items]
Gain (loss) from change in fair value of derivative liability	0	8,896	0	(4,825)
Debentures 2012 Series [Member]
Debt Conversion [Line Items]
Gain (loss) from change in fair value of derivative liability	$ 0	$ 3,523	$ 0	$ 15