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Inventories (Schedule of Inventories) (Details) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Inventories [Abstract]    
Raw materials $ 6,332 $ 5,844
Work in process 4,491 3,496
Finished goods 5,228 5,567
Provision for excess and obsolete inventory (469) (478)
Total inventories $ 15,582 $ 14,429