Note 6 - Inventories (Details Textual) - USD ($)	3 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Sep. 30, 2024
Inventory Write-down	$ 506,000	$ 20,000
Inventory, Raw Materials, Gross	31,975,000		$ 30,941,000
Semi-finished Goods and Component Parts [Member]
Inventory, Raw Materials, Gross	$ 10,600,000		$ 8,600,000