Note 9 - Leases - Operating Lease Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Total lease expense	$ 3,699	$ 3,463	$ 3,497
Cost of Sales [Member]
Total lease expense	3,412	3,198	3,253
Selling, General and Administrative Expenses [Member]
Total lease expense	$ 287	$ 265	$ 244