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, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Asset Impairment Charges, Total $ 1,400,000 $ 113,000 $ 3,200,000 $ 3,400,000  
Real Estate Owned, Amount of Loss at Acquisition   $ 115,000 232,000 $ 1,100,000  
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Foreclosure     287,000   $ 50,000
Mortgage Loans in Process of Foreclosure, Amount 0   0   299,000
Liabilities, Total 12,647,441,000   12,647,441,000   14,296,791,000 [1]
Fair Value, Recurring [Member]          
Liabilities, Total 0   0   0
Fair Value, Nonrecurring [Member]          
Liabilities, Total $ 0   $ 0   $ 0
Minimum [Member]          
Impaired Loans, Fair Value Adjustment, Percent 0.00%   0.00%   0.00%
Real Estate Owned, Fair Value Adjustment, Percent 0.00%   0.00%   0.00%
Maximum [Member]          
Impaired Loans, Fair Value Adjustment, Percent 100.00%   100.00%   75.00%
Real Estate Owned, Fair Value Adjustment, Percent 53.00%   53.00%   100.00%
Weighted Average [Member]          
Impaired Loans, Fair Value Adjustment, Percent 18.70%   18.70%   24.10%
Real Estate Owned, Fair Value Adjustment, Percent 44.20%   44.20%   40.60%
[1] derived from audited financial statements.