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Inventory (Schedule of Components of Inventory) (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Sep. 30, 2019
Inventory Disclosure [Abstract]    
Raw materials $ 12,616 $ 11,510
Work in-process 8,390 8,176
Finished goods 3,404 4,365
Inventory balance at end of period $ 24,410 $ 24,051