Fair Value of Financial Assets and Liabilities (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Fair value adjustment of warrant liabilities	$ 774	$ (1)	$ 774	$ (47)
Level 3 [Member]
Beginning balance at January 1, 2015
Recognition of warrant liabilities			$ 985
Fair value adjustment of warrant liabilities			774
Ending balance at September 30, 2015	$ 1,759		$ 1,759