Inventories - Schedule of Inventories (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Sep. 30, 2020
Components of inventories
Raw materials and supplies	$ 4,111	$ 6,548
Work-in-process	3,560	3,786
Finished goods	4,875	5,235
Total inventories	$ 12,546	$ 15,569

Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Gross amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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