Quarterly report [Sections 13 or 15(d)]

Note 12 - Fair Value Measurement (Details Textual)

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Note 12 - Fair Value Measurement (Details Textual)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2025
USD ($)
Jun. 30, 2024
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2024
USD ($)
Dec. 31, 2024
USD ($)
Asset Impairment Charges $ 1,200,000 $ 4,800,000 $ 3,600,000 $ 5,800,000  
Gains (Losses) on Sales of Other Real Estate $ (17,000) $ 1,000 $ 301,000 $ 96,000  
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Number of Loans     2   3
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Foreclosure     $ 132,000   $ 450,000
Number of Mortgage Loans in Process of Foreclosure 1   1   1
Mortgage Loans in Process of Foreclosure, Amount $ 82,422   $ 82,422   $ 82,422
Liabilities 15,656,845,000   15,656,845,000   15,734,871,000 [1]
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 20.00%   20.00%   19.00%
Maximum [Member]          
Impaired Loans, Fair Value Adjustment, Percent 70.00%   70.00%   75.00%
Real Estate Owned, Fair Value Adjustment, Percent 47.00%   47.00%   47.00%
Weighted Average [Member]          
Impaired Loans, Fair Value Adjustment, Percent 29.80%   29.80%   25.50%
Real Estate Owned, Fair Value Adjustment, Percent 35.70%   35.70%   22.70%
[1] Derived from audited financial statements.