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Inventories (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Inventory Disclosure [Abstract]    
Raw materials $ 1,148 $ 602
Work in process 6,677 3,850
Finished goods 10,817 3,405
Inventory, gross 18,642 7,857
Reserve for obsolescence (828) (397)
Inventory, net $ 17,814 $ 7,460