Inventories - Schedule of Components of Inventories (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Sep. 30, 2021
Inventory Disclosure [Abstract]
Purchased parts and raw materials	$ 20,486	$ 16,260
Work-in-process	6,673	4,865
Finished goods	4,797	5,055
Inventory, gross	31,956	26,180
Excess and obsolete reserves	(4,499)	(4,105)
Inventories	$ 27,457	$ 22,075

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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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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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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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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount of valuation reserve for inventory.

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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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