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Note 3 - Loans (Details Textual) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Sep. 30, 2020
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums, Total $ 1,100 $ 1,600  
Loans and Leases Receivable, Gross, Total 822,411 629,914 $ 648,368
Consumer and Other Loans [Member]      
Loans and Leases Receivable, Gross, Total 14,768 10,051 $ 11,102
Consumer and Other Loans [Member] | Demand Deposit Overdrafts [Member]      
Loans and Leases Receivable, Gross, Total $ 179 $ 143