Quarterly report [Sections 13 or 15(d)]

Note 13 - Income Taxes (Details Textual)

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Note 13 - Income Taxes (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2025
Mar. 31, 2024
Income Tax Expense (Benefit) $ 0 $ 0 $ 0 $ 0
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent     21.00%