Acquisition (Details 1) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Business Combinations [Abstract]
Net revenues	$ 7,803	$ 7,403	$ 15,361	$ 13,562
Net loss	$ (11,309)	$ (4,734)	$ (21,466)	$ (16,696)
Net loss per basic and diluted share:	$ (1.40)	$ (0.91)	$ (2.87)	$ (3.30)
Shares used in calculating net loss per basic and diluted share:	8,067,991	5,212,765	7,474,358	5,053,587