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Note 3 - Acquisitions (Details Textual) - USD ($) | Jan. 14, 2022 | Jan. 04, 2022 | Dec. 31, 2023 | Dec. 31, 2022
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Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets, Total | $ 8,495,000 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents | 312,000 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Assets | 52,000 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities, Total | 81,790,000 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Liabilities | 81,700,000 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Liabilities | 88,000 |  |  |
Payments to Acquire Businesses, Net of Cash Acquired, Total | (71,040,000) |  |  |
Goodwill |  |  | $ 71,498,000 | $ 71,498,000
Acquisition of the Honolulu, Hawaii Branch Office of the Bank of the Orient [Member] |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets, Total | 8,500,000 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents | 312,000 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Selected Performing Loans | 7,400,000 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles | 729,000 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Assets | 64,000 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities, Total | 81,800,000 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Liabilities | 81,700,000 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Certificate of Deposit Premium | 27,000 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Liabilities | 90,000 |  |  |
Payments to Acquire Businesses, Net of Cash Acquired, Total |  | $ (71,000,000) |  |
Goodwill | 2,300,000 |  |  |
Acquisition of the Honolulu, Hawaii Branch Office of the Bank of the Orient [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |
Business Combination, Acquired Receivable, Fair Value | 0 |  |  |
Acquisition of the Honolulu, Hawaii Branch Office of the Bank of the Orient [Member] | Core Deposits [Member] |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles | $ 729,000 |  |  |

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- Definition Amount of selected performing loans expected to be realized or consumed before one year or the normal operating cycle, if longer, acquired at the acquisition date. + References No definition available. + Details
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