Note 5 - Trade Accounts and Financing Receivables - Schedule of Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Beginning of period	$ 21	$ 67	$ 4	$ 125
Provision for credit losses	4	5	24	60
Recoveries	(3)	(38)	(3)	(144)
Charge-offs, net	2
Charge-offs, net		0	(1)	(7)
Currency translation	0	1	0	1
End of period	$ 24	$ 35	$ 24	$ 35