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Inventories - Schedule of Inventory (Details) - USD ($)
$ in Thousands
Sep. 30, 2016
Sep. 30, 2015
Components of inventories    
Raw materials and supplies $ 7,724 $ 7,212
Work-in-process 10,459 11,088
Finished goods 10,313 9,643
Total inventories $ 28,496 $ 27,943