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Inventories - Schedule of Inventories (Details) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Inventory Disclosure [Abstract]    
Raw materials $ 9,824 $ 8,696
Work-in-process 46,057 40,695
Finished goods 15,918 7,816
Total $ 71,799 $ 57,207