Note 8 - Loans and Related Allowance for Loan and Lease Losses - Impaired Loans by Class (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Recorded investment, with no related allowance	$ 2,013	$ 2,744
Unpaid principal balance, with no related allowance	2,923	3,221
Recorded investment, with related allowance	20,415	5,225
Unpaid principal balance, with related allowance	20,484	5,765
Related allowance	666	740
Recorded investment	22,428	7,969
Unpaid principal balance	23,407	8,986
Commercial Real Estate Portfolio Segment [Member] | Non-owner occupied Loan [Member]
Recorded investment, with no related allowance	1,085	1,547
Unpaid principal balance, with no related allowance	1,821	1,802
Recorded investment, with related allowance	13,055	3,750
Unpaid principal balance, with related allowance	13,124	4,277
Related allowance	310	655
Recorded investment	14,140	5,297
Unpaid principal balance	14,945	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	5,387	731
Unpaid principal balance, with related allowance	5,387	731
Related allowance	36	10
Recorded investment	5,387
Unpaid principal balance	5,387
Residential Portfolio Segment [Member]
Recorded investment, with no related allowance	573	820
Unpaid principal balance, with no related allowance	635	874
Recorded investment, with related allowance	319	284
Unpaid principal balance, with related allowance	319	284
Related allowance	13	17
Recorded investment	892	1,104
Unpaid principal balance	954	1,158
Commercial And Industrial [Member]
Recorded investment, with no related allowance	242	370
Unpaid principal balance, with no related allowance	354	538
Recorded investment, with related allowance	1,521	217
Unpaid principal balance, with related allowance	1,521	230
Related allowance	306	42
Recorded investment	1,763	587
Unpaid principal balance	1,875	768
Home Equity Lines of Credit [Member]
Recorded investment, with no related allowance	113	7
Unpaid principal balance, with no related allowance	113	7
Recorded investment, with related allowance	133	243
Unpaid principal balance, with related allowance	133	243
Related allowance	1	16
Recorded investment	246	250
Unpaid principal balance	$ 246	$ 250