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Note 13 - Commitments and Contingencies (Details Textual) - USD ($) | 3 Months Ended
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Dec. 31, 2025 | Sep. 30, 2025 | Sep. 30, 2024
Dividends, Common Stock, Cash |  | $ 287,000 | $ 304,000
O,2026, M 10-12, Dividends [Member] | Forecast [Member] |  |  |
Common Stock, Dividends, Per Share, Declared (in dollars per share) | $ 0.0075 |  |
Dividends, Common Stock, Cash | $ 291,000 |  |

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