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Inventories - Schedule of Inventories (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Sep. 30, 2016
Inventory Disclosure [Abstract]    
Raw materials and supplies $ 6,534 $ 7,724
Work-in-process 10,147 10,459
Finished goods 10,566 10,313
Total inventories $ 27,247 $ 28,496