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Note 2 - Revenue Recognition - Revenue by Geographic Area (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Total revenue	$ 110,803	$ 135,598
Product [Member]
Total revenue	104,204	116,036
Asia [Member] | Product [Member]
Total revenue	24,986	43,831
CANADA | Product [Member]
Total revenue	2,529	1,578
Europe [Member] | Product [Member]
Total revenue	4,864	6,430
MEXICO | Product [Member]
Total revenue	2,746	1,959
South America [Member] | Product [Member]
Total revenue	843	384
UNITED STATES | Product [Member]
Total revenue	67,311	61,009
Other [Member] | Product [Member]
Total revenue	$ 925	$ 845

X

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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