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Note 10 - Long-Term Debt (Details Textual) - USD ($)
Dec. 31, 2021
Dec. 31, 2020
Long Term Debt [Line Items]    
FHLB stock $ 1,317,000 $ 1,029,000
Maximum borrowing capacity with FHLB 341,398,000  
Long-term advances outstanding with FHLB 10,000,000  
Borrowings outstanding with FHLB 10,000,000  
Long-term Debt [Member]    
Long Term Debt [Line Items]    
Borrowings outstanding with FHLB   10,000,000
Other Short Term Debt [Member]    
Long Term Debt [Line Items]    
Borrowings outstanding with FHLB 0  
Letter of Credit [Member]    
Long Term Debt [Line Items]    
Borrowings outstanding with FHLB $ 350,000 $ 350,000