Financing (Details 8) (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 from change in fair value of derivative liability - warrants	$ 207	$ 258	$ 580	$ 3,424
Series D Convertible Preferred Stock [Member]
Debt Conversion [Line Items]
Gain from change in fair value of derivative liability - warrants	39	46	104	661
Warrants With Debenture Attached Series 2008 [Member]
Debt Conversion [Line Items]
Gain from change in fair value of derivative liability - warrants	70	122	250	1,567
Warrants With Debenture Attached Series 2010 [Member]
Debt Conversion [Line Items]
Gain from change in fair value of derivative liability - warrants	37	43	97	530
Warrants With Debenture Attached Series 2011 [Member]
Debt Conversion [Line Items]
Gain from change in fair value of derivative liability - warrants	24	29	68	422
Warrants With Debenture Attached Series 2012 [Member]
Debt Conversion [Line Items]
Gain from change in fair value of derivative liability - warrants	$ 37	$ 18	$ 61	$ 244