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Inventory (Schedule of Components of Inventory) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Sep. 30, 2020
Inventory Disclosure [Abstract]    
Raw materials $ 14,795 $ 13,354
Work in-process 8,780 8,381
Finished goods 4,280 3,790
Inventory balance at end of period $ 27,855 $ 25,525