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Note 7 - Goodwill and Intangibles (Details Textual) - USD ($) | 3 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Sep. 30, 2023
Goodwill | $ 71,498,000 | $ 71,498,000 |
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount |  |  | 9.60%
Goodwill, Impairment Loss | 0 | $ 0 |
Acquisition of the Honolulu, Hawaii Branch Office of the Bank of the Orient [Member] |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles | $ 729,000 |  |
Core Deposits [Member] | Minimum [Member] |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) | 8 years |  |
Core Deposits [Member] | Maximum [Member] |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) | 10 years |  |

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