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Inventories - Schedule of Inventories (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Inventory Disclosure [Abstract]    
Raw materials $ 2,049 $ 4,276
Work in progress 6,507 8,435
Finished products 13,085 9,314
Total $ 21,641 $ 22,025