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v3.25.1

Note 13 - Contingencies and Commitments (Details Textual) - USD ($) | 3 Months Ended
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Jun. 30, 2025 | Mar. 31, 2025 | Dec. 31, 2024 | Sep. 30, 2024 | Mar. 31, 2024 | Dec. 31, 2023 | Sep. 30, 2023
Dividends, Common Stock, Cash |  | $ 297,000 | $ 299,000 | $ 304,000 | $ 312,000 | $ 320,000 | $ 322,000
O,2025, M 4-6, Dividends [Member] | Forecast [Member] |  |  |  |  |  |  |
Common Stock, Dividends, Per Share, Declared (in dollars per share) | $ 0.0075 |  |  |  |  |  |
Dividends, Common Stock, Cash | $ 300,000 |  |  |  |  |  |

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