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 9 Months Ended 12 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Asset Impairment Charges $ 4,700,000 $ 7,200,000 $ 5,800,000 $ 13,500,000  
Real Estate Owned, Amount of Loss at Acquisition 55,000 $ 33,000 89,000 $ 28,000  
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Foreclosure     519,000   $ 360,000
Mortgage Loans in Process of Foreclosure, Amount 509,000   509,000   292,000
Liabilities 14,878,909,000   14,878,909,000   14,689,263,000 [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 16.00%   16.00%   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 26.00%   26.00%   25.00%
Real Estate Owned, Fair Value Adjustment, Percent 40.00%   40.00%   38.30%
[1] Derived from audited financial statements.