Note 6 - Inventories (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Sep. 30, 2023
Inventory Write-down	$ 100	$ 300	$ 144	$ 2,131
Inventory, Raw Materials, Gross	28,187		28,187		$ 26,832
Semi-finished Goods and Component Parts [Member]
Inventory, Raw Materials, Gross	$ 8,300		$ 8,300		$ 10,600