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Inventories - Schedule of Inventories (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Sep. 30, 2019
Inventory Disclosure [Abstract]    
Raw materials and supplies $ 4,387 $ 4,512
Work-in-process 3,617 2,721
Finished goods 4,242 3,276
Total inventories $ 12,246 $ 10,509