Financing (Details 8) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Debt Conversion [Line Items]
Gain (loss) from change in fair value of derivative liability - warrants	$ 0	$ 207	$ (1)	$ 580
Series D Convertible Preferred Stock [Member]
Debt Conversion [Line Items]
Gain (loss) from change in fair value of derivative liability - warrants	0	39	0	104
Warrants With Debenture Attached Series 2008 [Member]
Debt Conversion [Line Items]
Gain (loss) from change in fair value of derivative liability - warrants	0	70	(1)	250
Warrants With Debenture Attached Series 2010 [Member]
Debt Conversion [Line Items]
Gain (loss) from change in fair value of derivative liability - warrants	0	37	0	97
Warrants With Debenture Attached Series 2011 [Member]
Debt Conversion [Line Items]
Gain (loss) from change in fair value of derivative liability - warrants	0	24	0	68
Warrants With Debenture Attached Series 2012 [Member]
Debt Conversion [Line Items]
Gain (loss) from change in fair value of derivative liability - warrants	$ 0	$ 37	$ 0	$ 61