Financing (Details 8) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Debt Conversion [Line Items]
Gain from change in fair value of derivative liability - warrants	$ 38	$ 90	$ 618	$ 3,514
Series D Convertible Preferred Stock [Member]
Debt Conversion [Line Items]
Gain from change in fair value of derivative liability - warrants	7	16	108	614
Warrants With Debenture Attached Series 2008 [Member]
Debt Conversion [Line Items]
Gain from change in fair value of derivative liability - warrants	18	43	294	1,673
Warrants With Debenture Attached Series 2010 [Member]
Debt Conversion [Line Items]
Gain from change in fair value of derivative liability - warrants	6	15	101	572
Warrants With Debenture Attached Series 2011 [Member]
Debt Conversion [Line Items]
Gain from change in fair value of derivative liability - warrants	4	10	72	409
Warrants With Debenture Attached Series 2012 [Member]
Debt Conversion [Line Items]
Gain from change in fair value of derivative liability - warrants	$ 3	$ 6	$ 43	$ 246