Financing (Details) (USD $) In Thousands, unless otherwise specified			6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2012 Debenture Issuance 2006 [Member]	Jun. 30, 2012 Debenture Issuance 2007 [Member]	Jun. 30, 2012 Debenture Issuance 2008 [Member]	Jun. 30, 2012 Debenture Issuance 2009 [Member]	Jun. 30, 2012 Debenture Issuance 2010 [Member]	Jun. 30, 2012 Debenture Issuance 2011 [Member]	Jun. 30, 2012 Debenture Issuance 2012 [Member]
Debt Instrument, Face Amount	$ 304	$ 22,438	$ 6,080	$ 7,036	$ 6,468	$ 1,778	$ 3,881	$ 2,576	$ 2,200
Interest Rate			10.00%			14.00%	14.00%	14.00%	14.00%
Interest Rate Prior To Modification Minimum				13.00%	14.00%
Interest Rate Prior To Modification Maximum				14.00%	15.00%
Interest Rate Subsequent To Modification			9.50%	9.50%	9.50%	9.50%	9.50%	9.50%	9.50%
Default Interest Rate			0.00%	0.00%		20.00%	20.00%	20.00%	20.00%
Default Interest Rate, Minimum					20.00%
Default Interest Rate, Maximum					24.00%
Conversion Price - Lower of Fixed Price or Percentage of VWAP for Look-back Period, Fixed Price			2.00	2.00		2.00		0.10	0.10
Conversion Price - Lower of Fixed Price or Percentage of VWAP for Look-back Period, Fixed Price, Lower					1.00		0.10
Conversion Price - Lower of Fixed Price or Percentage of VWAP for Look-back Period, Fixed Price, Upper					2.00		0.30
Conversion Price - Lower of Fixed Price or Percentage of VWAP for Look-back Period, Anti-Dilution Adjusted Price			0.00648			0.006840	0.006840	0.006840	0.006840
Conversion Price - Lower of Fixed Price or Percentage of VWAP for Look-back Period, Anti-Dilution Adjusted Price, Lower				0.00576	0.00576
Conversion Price - Lower of Fixed Price or Percentage of VWAP for Look-back Period, Anti-Dilution Adjusted Price, Upper				0.00648	0.00684
Conversion Price - Lower of Fixed Price or Percentage of VWAP for Look-back Period, Anti-Dilution Adjusted Price, Percentage			90.00%			95.00%	95.00%	95.00%	95.00%
Conversion Price - Lower of Fixed Price or Percentage of VWAP for Look-back Period, Anti-Dilution Adjusted Price, Percentage, Lower				80.00%	80.00%
Conversion Price - Lower of Fixed Price or Percentage of VWAP for Look-back Period, Anti-Dilution Adjusted Price, Percentage, Upper				90.00%	95.00%
Conversion Price - Lower of Fixed Price or Percentage of VWAP for Look-back Period, Default Percentage			0.00%	0.00%		50.00%	50.00%	50.00%	50.00%
Conversion Price - Lower of Fixed Price or Percentage of VWAP for Look-back Period, Default Percentage, Lower					50.00%
Conversion Price - Lower of Fixed Price or Percentage of VWAP for Look-back Period, Default Percentage, Upper					75.00%
Look-back Period			125 days	125 days	125 days	125 days	60 days	60 days	60 days