Note 8 - Loans and Related Allowance for Loan and Lease Losses - Impaired Loans by Class (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Recorded investment, with no related allowance	$ 2,043	$ 2,744
Unpaid principal balance, with no related allowance	2,335	3,221
Recorded investment, with related allowance	6,861	5,225
Unpaid principal balance, with related allowance	7,471	5,765
Related allowance	856	740
Recorded investment	8,904	7,969
Unpaid principal balance	9,806	8,986
Commercial Real Estate Portfolio Segment [Member] | Non-owner occupied Loan [Member]
Recorded investment, with no related allowance	841	1,547
Unpaid principal balance, with no related allowance	965	1,802
Recorded investment, with related allowance	4,292	3,750
Unpaid principal balance, with related allowance	4,902	4,277
Related allowance	621	655
Recorded investment	5,133	5,297
Unpaid principal balance	5,867	6,079
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Loan [Member]
Recorded investment, with no related allowance		731
Unpaid principal balance, with no related allowance		731
Recorded investment, with related allowance	701	731
Unpaid principal balance, with related allowance	701	731
Related allowance	9	10
Recorded investment	701
Unpaid principal balance	701
Residential Portfolio Segment [Member]
Recorded investment, with no related allowance	697	820
Unpaid principal balance, with no related allowance	757	874
Recorded investment, with related allowance	278	284
Unpaid principal balance, with related allowance	278	284
Related allowance	13	17
Recorded investment	975	1,104
Unpaid principal balance	1,035	1,158
Commercial And Industrial [Member]
Recorded investment, with no related allowance	265	370
Unpaid principal balance, with no related allowance	373	538
Recorded investment, with related allowance	1,583	217
Unpaid principal balance, with related allowance	1,583	230
Related allowance	212	42
Recorded investment	1,848	587
Unpaid principal balance	1,956	768
Home Equity Lines of Credit [Member]
Recorded investment, with no related allowance	240	7
Unpaid principal balance, with no related allowance	240	7
Recorded investment, with related allowance	7	243
Unpaid principal balance, with related allowance	7	243
Related allowance	1	16
Recorded investment	247	250
Unpaid principal balance	$ 247	$ 250