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Inventories - Inventories (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Sep. 30, 2022
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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

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