Quarterly report pursuant to Section 13 or 15(d)

Inventories (Details)

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Inventories (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Inventory Disclosure [Abstract]    
Raw materials $ 10,994 $ 14,995
Work in progress 758 694
Finished goods 37,690 31,908
Total inventory $ 49,442 $ 47,597