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Inventories - Schedule of Inventories (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Sep. 30, 2022
--- | --- | ---
Components of inventories |  |
Raw materials and supplies | $ 1,684 | $ 2,968
Work-in-process | 4,061 | 3,356
Finished goods | 3,108 | 2,645
Total inventories | $ 8,853 | $ 8,969

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