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 6 Months Ended 12 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Asset Impairment Charges, Total $ 1,200,000 $ 1,400,000 $ 1,800,000 $ 3,300,000  
Real Estate Owned, Amount of Loss at Acquisition 125,000 $ 540,000 119,000 $ 697,000  
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Foreclosure     60,000   $ 50,000
Mortgage Loans in Process of Foreclosure, Amount 212,000   212,000   299,000
Liabilities, Total 13,282,399,000   13,282,399,000   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 10.00%   10.00%   0.00%
Maximum [Member]          
Impaired Loans, Fair Value Adjustment, Percent 75.00%   75.00%   75.00%
Real Estate Owned, Fair Value Adjustment, Percent 100.00%   100.00%   100.00%
Weighted Average [Member]          
Impaired Loans, Fair Value Adjustment, Percent 21.20%   21.20%   24.10%
Real Estate Owned, Fair Value Adjustment, Percent 57.00%   57.00%   40.60%
[1] derived from audited financial statements.