Note 5 - Trade Accounts and Financing Receivables - Schedule of Trade Accounts and Notes Receivable (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023
Trade accounts receivable	$ 13,692		$ 16,151
Allowance for credit losses	(24)	$ (21)	(4)	$ (35)	$ (67)	$ (125)
Total	13,668		16,147
Less current portion	(13,668)		(14,637)
Non-current trade accounts receivable	$ 0		$ 1,510

Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.

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