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Note 11 - Fair Value Measurement (Details Textual) - USD ($) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Asset Impairment Charges | $ 4,800,000 | $ 4,100,000 | $ 5,800,000 | $ 6,300,000 |
Real Estate Owned, Amount of Loss at Acquisition | 1,000 | $ 5,000 | 96,000 | $ 5,000 |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Foreclosure |  |  | 529,000 |  | $ 360,000
Mortgage Loans in Process of Foreclosure, Amount | 426,000 |  | 426,000 |  | 292,000
Liabilities | 14,539,236,000 |  | 14,539,236,000 |  | 14,689,263,000
Fair Value, Recurring [Member] |  |  |  |  |
Liabilities | 0 |  | 0 |  | 0
Fair Value, Nonrecurring [Member] |  |  |  |  |
Liabilities | $ 0 |  | $ 0 |  | $ 0
Minimum [Member] |  |  |  |  |
Impaired Loans, Fair Value Adjustment, Percent | 0.00% |  | 0.00% |  | 0.00%
Real Estate Owned, Fair Value Adjustment, Percent | 10.00% |  | 10.00% |  | 25.00%
Maximum [Member] |  |  |  |  |
Impaired Loans, Fair Value Adjustment, Percent | 75.00% |  | 75.00% |  | 66.00%
Real Estate Owned, Fair Value Adjustment, Percent | 100.00% |  | 100.00% |  | 100.00%
Weighted Average [Member] |  |  |  |  |
Impaired Loans, Fair Value Adjustment, Percent | 29.00% |  | 29.00% |  | 25.00%
Real Estate Owned, Fair Value Adjustment, Percent | 27.00% |  | 27.00% |  | 38.30%

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