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Note 1 - Presentation of Interim Information (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Oct. 24, 2022
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Interest and Fee Income, Loans and Leases, Total   $ 6,533,000 $ 6,252,000 $ 17,885,000 $ 18,071,000  
SBA CARES Act Paycheck Protection Program [Member]            
Financing Receivable, before Allowance for Credit Loss, Total           $ 62,400,000
Interest and Fee Income, Loans and Leases, Total   $ 7,000 $ 784,000 $ 34,000 $ 1,700,000  
SBA CARES Act Paycheck Protection Program [Member] | Subsequent Event [Member]            
Proceeds from Collection of Notes Receivable $ 62,300,000          
SBA CARES Act Paycheck Protection Program [Member] | Second Draw Loans [Member]            
Financing Receivable, before Allowance for Credit Loss, Total           $ 16,500,000