Note 4 - Trade Accounts and Financing Receivables - Schedule of Allowance for Credit Losses (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Beginning of period | $ 27 | $ 21 | $ 63 | $ 4 |
| Provision for credit losses | 8 | 4 | 55 | 24 |
| Recoveries | (11) | (3) | (50) | (3) |
| Charge-offs, net | 0 | 2 | (44) | (1) |
| End of period | $ 24 | $ 24 | $ 24 | $ 24 |
| X | ||||||||||
- Definition Amount of direct write-downs of accounts receivable charged against the allowance. No definition available.
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| X | ||||||||||
- Definition Amount of allowance for credit loss on accounts receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of increase in allowance for credit loss on accounts receivable, from recovery. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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