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Inventories - Inventories (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Sep. 30, 2022
Inventory Disclosure [Abstract]    
Finished goods $ 15,614 $ 14,653
Work in process 6,905 6,230
Raw materials 27,761 25,609
Obsolescence reserve (net realizable value adjustment) (13,940) (13,971)
Total 36,340 32,521
Less current portion (20,736) (19,995)
Non-current portion $ 15,604 $ 12,526