Note 4 - Loans and Allowance for Credit Losses on Loans - Non-accrual Loans (Details) - USD ($) $ in Thousands		Sep. 30, 2022	Dec. 31, 2021
Non-accrual with no allowance		$ 4,456	$ 2,375
Non-accrual loans		10,580	6,712
Troubled Debt Restructurings, excluding non-accrual loans	[1]	0	12
Past due 90-days-or-more and still accruing interest		32	684
Home Equity Line of Credit [Member]
Non-accrual with no allowance		0	0
Non-accrual loans		524	646
Troubled Debt Restructurings, excluding non-accrual loans	[1]	0	0
Past due 90-days-or-more and still accruing interest		0	0
Credit Cards [Member]
Non-accrual with no allowance		0	0
Non-accrual loans		12	0
Troubled Debt Restructurings, excluding non-accrual loans	[1]	0	0
Past due 90-days-or-more and still accruing interest		32	0
Commercial Real Estate Portfolio Segment [Member]
Non-accrual with no allowance		2,021	1,151
Non-accrual loans		3,847	2,468
Troubled Debt Restructurings, excluding non-accrual loans	[1]	0	0
Past due 90-days-or-more and still accruing interest		0	0
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member]
Non-accrual with no allowance		0	486
Non-accrual loans		620	720
Troubled Debt Restructurings, excluding non-accrual loans	[1]	0	0
Past due 90-days-or-more and still accruing interest		0	0
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied [Member]
Non-accrual with no allowance		2,021	665
Non-accrual loans		3,227	1,748
Troubled Debt Restructurings, excluding non-accrual loans	[1]	0	0
Past due 90-days-or-more and still accruing interest		0	0
Commercial and Industrial Portfolio Segment [Member] | Term [Member]
Non-accrual with no allowance		403	419
Non-accrual loans		1,474	670
Troubled Debt Restructurings, excluding non-accrual loans	[1]	0	12
Past due 90-days-or-more and still accruing interest		0	0
Commercial and Industrial Portfolio Segment [Member] | PPP Loans [Member]
Non-accrual with no allowance		42	0
Non-accrual loans		42	0
Troubled Debt Restructurings, excluding non-accrual loans	[1]	0	0
Past due 90-days-or-more and still accruing interest		0	592
Commercial and Industrial Portfolio Segment [Member] | Lines of Credit [Member]
Non-accrual with no allowance		1,479	0
Non-accrual loans		1,620	228
Troubled Debt Restructurings, excluding non-accrual loans	[1]	0	0
Past due 90-days-or-more and still accruing interest		0	56
Total Commercial and Industrial Portfolio Segment [Member]
Non-accrual with no allowance		1,924	419
Non-accrual loans		3,136	898
Troubled Debt Restructurings, excluding non-accrual loans	[1]	0	12
Past due 90-days-or-more and still accruing interest		0	648
Residential Real Estate Portfolio Segment [Member]
Non-accrual with no allowance		511	805
Non-accrual loans		2,695	2,290
Troubled Debt Restructurings, excluding non-accrual loans	[1]	0	0
Past due 90-days-or-more and still accruing interest		0	36
Residential Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member]
Non-accrual with no allowance		0	0
Non-accrual loans		227	293
Troubled Debt Restructurings, excluding non-accrual loans	[1]	0	0
Past due 90-days-or-more and still accruing interest		0	0
Residential Real Estate Portfolio Segment [Member] | Owner Occupied [Member]
Non-accrual with no allowance		511	805
Non-accrual loans		2,468	1,997
Troubled Debt Restructurings, excluding non-accrual loans	[1]	0	0
Past due 90-days-or-more and still accruing interest		0	36
Construction and Development [Member]
Non-accrual with no allowance		0	0
Non-accrual loans		0	0
Troubled Debt Restructurings, excluding non-accrual loans	[1]	0	0
Past due 90-days-or-more and still accruing interest		0	0
Consumer Portfolio Segment [Member]
Non-accrual with no allowance		0	0
Non-accrual loans		366	410
Troubled Debt Restructurings, excluding non-accrual loans	[1]	0	0
Past due 90-days-or-more and still accruing interest		0	0
Finance Leases Portfolio Segment [Member]
Non-accrual with no allowance		0	0
Non-accrual loans		0	0
Troubled Debt Restructurings, excluding non-accrual loans	[1]	0	0
Past due 90-days-or-more and still accruing interest		$ 0	$ 0

[1] Does not included TDRs captured in the non-accrual column.