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Inventories - Schedule of Inventories (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Sep. 30, 2019
Inventory Disclosure [Abstract]    
Raw materials and supplies $ 5,629 $ 4,512
Work-in-process 4,052 2,721
Finished goods 5,607 3,276
Total inventories $ 15,288 $ 10,509