Note 6 - Loans and Allowance for Credit Losses on Loans - Collateral Dependent Financing Receivables (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Financing Receivable, Loans Individually Evaluated	$ 32,187	$ 27,523
Allowance for Credit Losses, Loans Individually Evaluated	1,415	2,096
Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	32,064	27,346
Non Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	123	177
Collateral Pledged [Member]
Financing Receivable, Loans Individually Evaluated	32,187	27,523
Allowance for Credit Losses, Loans Individually Evaluated	1,415	2,096
Commercial Loans [Member]
Financing Receivable, Loans Individually Evaluated	123	177
Allowance for Credit Losses, Loans Individually Evaluated	0	0
Commercial Loans [Member] | Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Commercial Loans [Member] | Non Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	123	177
Commercial Loans [Member] | Collateral Pledged [Member]
Financing Receivable, Loans Individually Evaluated	123	177
Allowance for Credit Losses, Loans Individually Evaluated	0	0
Commercial Real Estate Owner Occupied Professional, Medical [Member]
Financing Receivable, Loans Individually Evaluated	1,998	2,073
Allowance for Credit Losses, Loans Individually Evaluated	222	199
Commercial Real Estate Owner Occupied Professional, Medical [Member] | Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	1,998	2,073
Commercial Real Estate Owner Occupied Professional, Medical [Member] | Non Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Commercial Real Estate Owner Occupied Professional, Medical [Member] | Collateral Pledged [Member]
Financing Receivable, Loans Individually Evaluated	1,998	2,073
Allowance for Credit Losses, Loans Individually Evaluated	222	199
Commercial Real Estate Owner Occupied, Retail [Member]
Financing Receivable, Loans Individually Evaluated	5,227	5,559
Allowance for Credit Losses, Loans Individually Evaluated	0	0
Commercial Real Estate Owner Occupied, Retail [Member] | Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	5,227	5,559
Commercial Real Estate Owner Occupied, Retail [Member] | Non Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Commercial Real Estate Owner Occupied, Retail [Member] | Collateral Pledged [Member]
Financing Receivable, Loans Individually Evaluated	5,227	5,559
Allowance for Credit Losses, Loans Individually Evaluated	0	0
Commercial Real Estate Owner Occupied, Other [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Allowance for Credit Losses, Loans Individually Evaluated	0	0
Commercial Real Estate Owner Occupied, Other [Member] | Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Commercial Real Estate Owner Occupied, Other [Member] | Non Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Commercial Real Estate Owner Occupied, Other [Member] | Collateral Pledged [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Allowance for Credit Losses, Loans Individually Evaluated	0	0
Commercial Real Estate Nonowner Occupied Hotels and Motels [Member]
Financing Receivable, Loans Individually Evaluated	2,962	3,085
Allowance for Credit Losses, Loans Individually Evaluated	0	669
Commercial Real Estate Nonowner Occupied Hotels and Motels [Member] | Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	2,962	3,085
Commercial Real Estate Nonowner Occupied Hotels and Motels [Member] | Non Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Commercial Real Estate Nonowner Occupied Hotels and Motels [Member] | Collateral Pledged [Member]
Financing Receivable, Loans Individually Evaluated	2,962	3,085
Allowance for Credit Losses, Loans Individually Evaluated	0	669
Commercial Real Estate Nonowner Occupied Mini Storage [Member]
Financing Receivable, Loans Individually Evaluated	0	1,058
Allowance for Credit Losses, Loans Individually Evaluated	0	0
Commercial Real Estate Nonowner Occupied Mini Storage [Member] | Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	0	1,058
Commercial Real Estate Nonowner Occupied Mini Storage [Member] | Non Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Commercial Real Estate Nonowner Occupied Mini Storage [Member] | Collateral Pledged [Member]
Financing Receivable, Loans Individually Evaluated	0	1,058
Allowance for Credit Losses, Loans Individually Evaluated	0	0
Multifamily [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Allowance for Credit Losses, Loans Individually Evaluated	0	0
Multifamily [Member] | Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Multifamily [Member] | Non Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Multifamily [Member] | Collateral Pledged [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Allowance for Credit Losses, Loans Individually Evaluated	0	0
Commercial Real Estate Nonowner Occupied, Retail [Member]
Financing Receivable, Loans Individually Evaluated	9,978	2,693
Allowance for Credit Losses, Loans Individually Evaluated	97	0
Commercial Real Estate Nonowner Occupied, Retail [Member] | Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	9,978	2,693
Commercial Real Estate Nonowner Occupied, Retail [Member] | Non Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Commercial Real Estate Nonowner Occupied, Retail [Member] | Collateral Pledged [Member]
Financing Receivable, Loans Individually Evaluated	9,978	2,693
Allowance for Credit Losses, Loans Individually Evaluated	97	0
Commercial Real Estate Nonowner Occupied, Other [Member]
Financing Receivable, Loans Individually Evaluated	5,526	5,726
Allowance for Credit Losses, Loans Individually Evaluated	292	69
Commercial Real Estate Nonowner Occupied, Other [Member] | Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	5,526	5,726
Commercial Real Estate Nonowner Occupied, Other [Member] | Non Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Commercial Real Estate Nonowner Occupied, Other [Member] | Collateral Pledged [Member]
Financing Receivable, Loans Individually Evaluated	5,526	5,726
Allowance for Credit Losses, Loans Individually Evaluated	292	69
Land and Land Improvements [Member]
Financing Receivable, Loans Individually Evaluated	1,428	2,004
Allowance for Credit Losses, Loans Individually Evaluated	520	723
Land and Land Improvements [Member] | Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	1,428	2,004
Land and Land Improvements [Member] | Non Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Land and Land Improvements [Member] | Collateral Pledged [Member]
Financing Receivable, Loans Individually Evaluated	1,428	2,004
Allowance for Credit Losses, Loans Individually Evaluated	520	723
Construction Loans [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Allowance for Credit Losses, Loans Individually Evaluated	0	0
Construction Loans [Member] | Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Construction Loans [Member] | Non Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Construction Loans [Member] | Collateral Pledged [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Allowance for Credit Losses, Loans Individually Evaluated	0	0
Residential 1-4 Family Real Estate, Personal Residence [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Allowance for Credit Losses, Loans Individually Evaluated	0	0
Residential 1-4 Family Real Estate, Personal Residence [Member] | Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Residential 1-4 Family Real Estate, Personal Residence [Member] | Non Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Residential 1-4 Family Real Estate, Personal Residence [Member] | Collateral Pledged [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Allowance for Credit Losses, Loans Individually Evaluated	0	0
Residential 1-4 Family Real Estate, Rental Small Loan [Member]
Financing Receivable, Loans Individually Evaluated	1,412	1,463
Allowance for Credit Losses, Loans Individually Evaluated	284	436
Residential 1-4 Family Real Estate, Rental Small Loan [Member] | Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	1,412	1,463
Residential 1-4 Family Real Estate, Rental Small Loan [Member] | Non Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Residential 1-4 Family Real Estate, Rental Small Loan [Member] | Collateral Pledged [Member]
Financing Receivable, Loans Individually Evaluated	1,412	1,463
Allowance for Credit Losses, Loans Individually Evaluated	284	436
Residential 1-4 Family Real Estate, Rental Large Loan [Member]
Financing Receivable, Loans Individually Evaluated	3,061	3,162
Allowance for Credit Losses, Loans Individually Evaluated	0	0
Residential 1-4 Family Real Estate, Rental Large Loan [Member] | Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	3,061	3,162
Residential 1-4 Family Real Estate, Rental Large Loan [Member] | Non Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Residential 1-4 Family Real Estate, Rental Large Loan [Member] | Collateral Pledged [Member]
Financing Receivable, Loans Individually Evaluated	3,061	3,162
Allowance for Credit Losses, Loans Individually Evaluated	0	0
Home Equity Loan [Member]
Financing Receivable, Loans Individually Evaluated	472	523
Allowance for Credit Losses, Loans Individually Evaluated	0	0
Home Equity Loan [Member] | Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	472	523
Home Equity Loan [Member] | Non Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Home Equity Loan [Member] | Collateral Pledged [Member]
Financing Receivable, Loans Individually Evaluated	472	523
Allowance for Credit Losses, Loans Individually Evaluated	0	0
Consumer Portfolio Segment [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Allowance for Credit Losses, Loans Individually Evaluated	0	0
Consumer Portfolio Segment [Member] | Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Consumer Portfolio Segment [Member] | Non Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Consumer Portfolio Segment [Member] | Collateral Pledged [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Allowance for Credit Losses, Loans Individually Evaluated	0	0
Credit Card Receivable [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Allowance for Credit Losses, Loans Individually Evaluated	0	0
Credit Card Receivable [Member] | Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Credit Card Receivable [Member] | Non Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Credit Card Receivable [Member] | Collateral Pledged [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Allowance for Credit Losses, Loans Individually Evaluated	0	0
Bank Overdrafts [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Allowance for Credit Losses, Loans Individually Evaluated	0	0
Bank Overdrafts [Member] | Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Bank Overdrafts [Member] | Non Real Estate [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Bank Overdrafts [Member] | Collateral Pledged [Member]
Financing Receivable, Loans Individually Evaluated	0	0
Allowance for Credit Losses, Loans Individually Evaluated	$ 0	$ 0