Note 11 - Supplementary Balance Sheet Information - Schedule of Inventory (Details) - USD ($) $ in Thousands	12 Months Ended
Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Raw materials and purchased parts	$ 57,230	$ 59,861
Work-in-process	9,118	11,400
Finished goods	48,908	56,937
Total inventories	115,256	128,198
SEC Schedule, 12-09, Reserve, Inventory [Member]
Balance	4,991	4,082	$ 3,681
Provisions	8,186	3,324	1,752
Inventory disposals and adjustments	(3,022)	(2,415)	(1,351)
Balance	$ 10,155	$ 4,991	$ 4,082

Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.

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