Financing (Details 2) - USD ($) shares in Thousands, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Debt Conversion [Line Items]
Debentures, Outstanding principal and accrued interest	$ 41,534
Debentures, Principal and accrued interest converted since inception	$ 12,599
Hybrid financial instruments (in shares)	456,549,785	436,904,318
Common Stock [Member]
Debt Conversion [Line Items]
Hybrid financial instruments (in shares)	2,996,437