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Note 5 - Foreclosed Assets (Details Textual) - USD ($)
Mar. 31, 2023
Dec. 31, 2022
Mortgage Loans in Process of Foreclosure, Amount $ 5,000 $ 0
Other Real Estate, Foreclosed Assets, and Repossessed Assets, Total $ 1,393,000 476,000
Foreclosed Residential Real Estate Properties, Physical Possession Without Title [Member]    
Other Real Estate, Foreclosed Assets, and Repossessed Assets, Total   $ 0