Quarterly report pursuant to Section 13 or 15(d)

Note 11 - Fair Value Measurement (Details Textual)

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Note 11 - Fair Value Measurement (Details Textual) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Asset Impairment Charges $ 1,100,000 $ 2,300,000  
Real Estate Owned, Amount of Loss at Acquisition 95,000 $ 0  
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Foreclosure 450,000   $ 360,000
Mortgage Loans in Process of Foreclosure, Amount 547,000   292,000
Liabilities 14,245,594,000   14,689,263,000 [1]
Fair Value, Recurring [Member]      
Liabilities     0
Fair Value, Nonrecurring [Member]      
Liabilities $ 0   $ 0
Minimum [Member]      
Impaired Loans, Fair Value Adjustment, Percent 0.00%   0.00%
Real Estate Owned, Fair Value Adjustment, Percent 25.00%   25.00%
Maximum [Member]      
Impaired Loans, Fair Value Adjustment, Percent 68.00%   66.00%
Real Estate Owned, Fair Value Adjustment, Percent 100.00%   100.00%
Weighted Average [Member]      
Impaired Loans, Fair Value Adjustment, Percent 24.00%   25.00%
Real Estate Owned, Fair Value Adjustment, Percent 49.70%   38.30%
[1] derived from audited financial statements.