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Note 16 - Commitments and Contingencies - Commitments to Extend Credit (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Fixed rate $ 3,250 $ 4,946
Adjustable rate 10,996 930
Commitments to extend credit 121,525 114,428
Standby Letters of Credit [Member]    
Commitments to extend credit 473 1,295
Unused Lines of Credit On Credit Cards [Member]    
Commitments to extend credit 6,915 6,641
Undisbursed Commercial and Personal Lines of Credit [Member]    
Commitments to extend credit 26,800 26,862
Undisbursed Portion of Construction Loans in Process [Member]    
Commitments to extend credit 23,081 26,675
Undisbursed Portion of Home Equity Lines of Credit [Member]    
Commitments to extend credit $ 50,010 $ 47,079