Financing (Details 7) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Face Value	$ 30,019	$ 9,362
Fair Value	76,517	16,458
Common stock Shares	6,800,531	1,036,429
Debentures 2006 Series [Member]
Face Value	6,080
Fair Value	17,301
Common stock Shares	1,531,358
Debentures 2007 Series [Member]
Face Value	7,036	7,682
Fair Value	19,512	13,115
Common stock Shares	1,748,554	836,428
Debentures 2008 Series [Member]
Face Value	6,468	1,680
Fair Value	17,758	3,343
Common stock Shares	1,586,202	200,001
Debentures 2009 Series [Member]
Face Value	1,778
Fair Value	4,478
Common stock Shares	391,651
Debentures 2010 Series [Member]
Face Value	3,881
Fair Value	8,355
Common stock Shares	735,667
Debentures 2011 Series [Member]
Face Value	2,576
Fair Value	5,259
Common stock Shares	464,141
Debentures 2012 Series [Member]
Face Value	2,200
Fair Value	3,854
Common stock Shares	$ 342,958