Financing (Details 5) - USD ($) shares in Thousands, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Debt Conversion [Line Items]
Debentures, Face Value	$ 35,806	$ 35,845
Debentures, Fair Value	$ 40,392	$ 37,384
Debentures, Common Stock Shares	456,549,785	436,904,318
Debentures 2006 Series [Member]
Debt Conversion [Line Items]
Debentures, Face Value	$ 1,961	$ 1,961
Debentures, Fair Value	$ 2,210	$ 2,019
Debentures, Common Stock Shares	25,242,791	23,871,436
Debentures 2007 Series [Member]
Debt Conversion [Line Items]
Debentures, Face Value	$ 814	$ 814
Debentures, Fair Value	$ 1,070	$ 1,000
Debentures, Common Stock Shares	12,006,008	11,549,397
Debentures 2008 Series [Member]
Debt Conversion [Line Items]
Debentures, Face Value	$ 1,925	$ 1,925
Debentures, Fair Value	$ 2,093	$ 1,949
Debentures, Common Stock Shares	23,463,424	22,598,665
Debentures 2009 Series [Member]
Debt Conversion [Line Items]
Debentures, Face Value	$ 0	$ 7
Debentures, Fair Value	$ 30	$ 46
Debentures, Common Stock Shares	331,733	517,119
Debentures 2011 Series [Member]
Debt Conversion [Line Items]
Debentures, Face Value	$ 794	$ 785
Debentures, Fair Value	$ 893	$ 800
Debentures, Common Stock Shares	10,200,234	9,469,332
Debentures 2012 Series [Member]
Debt Conversion [Line Items]
Debentures, Face Value	$ 972	$ 972
Debentures, Fair Value	$ 1,199	$ 1,111
Debentures, Common Stock Shares	13,527,912	12,926,448
Debentures 2013 Series [Member]
Debt Conversion [Line Items]
Debentures, Face Value	$ 29,190	$ 29,211
Debentures, Fair Value	$ 32,737	$ 30,297
Debentures, Common Stock Shares	369,946,171	354,041,487
Debentures 2014 Series [Member]
Debt Conversion [Line Items]
Debentures, Face Value	$ 150	$ 170
Debentures, Fair Value	$ 160	$ 162
Debentures, Common Stock Shares	1,831,512	1,930,434