Note 7 - Trade Accounts and Notes Receivable - Schedule of Allowance for Credit Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Beginning of period	$ 125	$ 591
Provision for credit losses	65	428
Recoveries	(175)	(566)
Write-offs	(11)	(303)
Currency translation	0	(25)
End of period	$ 4	$ 125