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v3.25.3

Note 2 - Summary of Significant Accounting Policies (Details Textual) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2025 USD ($) | Sep. 30, 2024 USD ($) | Sep. 30, 2023 USD ($)
Realized Gain (Loss), Foreign Currency Transaction, before Tax | $ 2,000 | $ 2,800 | $ 4,200
Government Assistance, Nonoperating Income, Increase (Decrease), Statement of Income or Comprehensive Income [Extensible Enumeration] | Other Nonoperating Income (Expense) | Other Nonoperating Income (Expense) |
Government Assistance, Nonoperating Income, Increase (Decrease) | $ 700 | $ 2,100 |
Government Assistance Amount Advance Current | 1,900 | 1,400 |
Effective Income Tax Rate Reconciliation, Deduction, Worthless Stock, Amount | 45,600 | (0) | (0)
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions | $ 2,500 | $ 0 | $ 0
Minimum [Member] |  |  |
Standard Payment Period (Year) | 30 years |  |
Maximum [Member] |  |  |
Standard Payment Period (Year) | 60 years |  |
Revenue Benchmark [Member] | Customer Concentration Risk [Member] |  |  |
Number of Major Customers | 0 | 0 | 0
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Ten Largest Customers [Member] |  |  |
Concentration Risk, Percentage | 25.00% | 20.00% | 20.00%

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