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Note 14 - Fair Value (Details Textual) - USD ($)
 1 Months Ended 3 Months Ended 12 Months Ended
Jan. 31, 2023
Dec. 31, 2023
Dec. 31, 2023
Dec. 31, 2022
Sep. 30, 2023
Valuation Reserve on Premises Held-for-sale $ 553,000 $ 49,000 $ 602,000 [1] $ (0) [1]  
Other Real Estate Owned, Gross   472,000 472,000 472,000  
Other Real Estate with Valuation Adjustments   67,000 67,000    
Other Real Estate   405,000 405,000 472,000  
Foreclosed Assets, Gross         $ 431,000
Other Foreclosed Assets, Valuation Allowance   111,000 111,000    
Foreclosed Assets, Net of Valuation Reserve   387,000 387,000    
Foreclosed Assets Valuation Adjustments, With Valuation Reserve       $ 31,000  
Impaired Loans [Member]          
Other Foreclosed Assets, Valuation Allowance   $ 44,000 $ 44,000    
[1] Not within the scope of ASC 606