Inventories (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Inventory [Line Items]
Raw materials	$ 3,385	$ 2,299
Work in progress	29	140
Finished goods	682	345
Total	$ 4,096	$ 2,784	[1]

[1] Derived from the audited December 31, 2014 financial statements