Financing (Details 5) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Debt Conversion [Line Items]
Debentures, Face Value	$ 41,017	$ 28,887
Debentures, Fair Value	38,250	64,292
Debentures, Common Stock Shares	15,619,639	22,696,138
Debentures 2006 Series [Member]
Debt Conversion [Line Items]
Debentures, Face Value	1,962	6,180
Debentures, Fair Value	2,008	14,758
Debentures, Common Stock Shares	819,019	5,196,283
Debentures 2007 Series [Member]
Debt Conversion [Line Items]
Debentures, Face Value	839	6,856
Debentures, Fair Value	533	17,172
Debentures, Common Stock Shares	216,720	6,098,480
Debentures 2008 Series [Member]
Debt Conversion [Line Items]
Debentures, Face Value	2,047	6,468
Debentures, Fair Value	1,905	15,492
Debentures, Common Stock Shares	779,294	5,487,497
Debentures 2009 Series [Member]
Debt Conversion [Line Items]
Debentures, Face Value	134	1,644
Debentures, Fair Value	151	3,565
Debentures, Common Stock Shares	61,563	1,243,390
Debentures 2010 Series [Member]
Debt Conversion [Line Items]
Debentures, Face Value		3,806
Debentures, Fair Value		7,178
Debentures, Common Stock Shares		2,512,724
Debentures 2011 Series [Member]
Debt Conversion [Line Items]
Debentures, Face Value	852	1,954
Debentures, Fair Value	854	3,080
Debentures, Common Stock Shares	348,437	1,084,237
Debentures 2012 Series [Member]
Debt Conversion [Line Items]
Debentures, Face Value	972	1,979
Debentures, Fair Value	1,392	3,047
Debentures, Common Stock Shares	568,305	1,073,527
Debentures 2013 Series [Member]
Debt Conversion [Line Items]
Debentures, Face Value	34,211
Debentures, Fair Value	31,407
Debentures, Common Stock Shares	$ 12,826,301