Financing (Details 4) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Debt Conversion [Line Items]
Gain (loss) from change in fair value of derivative liability	$ 107	$ 55	$ 244	$ 1,998
Series C Convertible Preferred Stock [Member]
Debt Conversion [Line Items]
Gain (loss) from change in fair value of derivative liability	100	76	228	1,878
Series D Convertible Preferred Stock [Member]
Debt Conversion [Line Items]
Gain (loss) from change in fair value of derivative liability	7	5	16	136
Debentures 2006 Series [Member]
Debt Conversion [Line Items]
Gain (loss) from change in fair value of derivative liability	$ 0	$ (26)	$ 0	$ (16)