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Inventories (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Inventories Disclosure [Abstract]    
Finished Goods $ 5,835 $ 6,936
Work in Process 3,838 3,667
Raw Materials 14,221 14,484
Total Inventories, Net $ 23,894 $ 25,087