Financing (Details 2) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Debt Conversion [Line Items]
Debentures, Outstanding principal and accrued interest	$ 40,779
Debentures, Principal and accrued interest converted since inception	$ 12,577
Hybrid financial instruments (in shares)	448,151,143	436,904,318
Common Stock [Member]
Debt Conversion [Line Items]
Hybrid financial instruments (in shares)	2,754,770