Inventories - Components of Inventories (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Sep. 30, 2018
Inventory Disclosure [Abstract]
Raw materials	$ 1,961	$ 1,890
Work-in process	753	780
Finished products	1,454	1,346
Total	$ 4,168	$ 4,016

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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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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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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 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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