Note 4 - Loans and Allowance for Credit Losses on Loans - Non-accrual Loans (Details) - USD ($) $ in Thousands		Mar. 31, 2022	Dec. 31, 2021
Non-accrual with no allowance		$ 4,504	$ 2,375
Non-accrual loans		12,494	6,712
Troubled Debt Restructurings, excluding non-accrual loans	[1]	10	12
Past due 90-days-or-more and still accruing interest		300	684
Home Equity Line of Credit [Member]
Non-accrual with no allowance		0	0
Non-accrual loans		481	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		0	0
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-accrual with no allowance		2,722	1,151
Non-accrual loans		5,029	2,468
Troubled Debt Restructurings, excluding non-accrual loans	[1]	0	0
Past due 90-days-or-more and still accruing interest		115	0
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member]
Non-accrual with no allowance		485	486
Non-accrual loans		1,117	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		2,237	665
Non-accrual loans		3,912	1,748
Troubled Debt Restructurings, excluding non-accrual loans	[1]	0	0
Past due 90-days-or-more and still accruing interest		115	0
Commercial and Industrial Portfolio Segment [Member] | Term [Member]
Non-accrual with no allowance		490	419
Non-accrual loans		3,053	670
Troubled Debt Restructurings, excluding non-accrual loans	[1]	10	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		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		4	592
Commercial and Industrial Portfolio Segment [Member] | Lines of Credit [Member]
Non-accrual with no allowance		498	0
Non-accrual loans		663	228
Troubled Debt Restructurings, excluding non-accrual loans	[1]	0	0
Past due 90-days-or-more and still accruing interest		30	56
Total Commercial and Industrial Portfolio Segment [Member]
Non-accrual with no allowance		988	419
Non-accrual loans		3,716	898
Troubled Debt Restructurings, excluding non-accrual loans	[1]	10	12
Past due 90-days-or-more and still accruing interest		34	648
Residential Real Estate Portfolio Segment [Member]
Non-accrual with no allowance		794	805
Non-accrual loans		2,918	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		282	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		794	805
Non-accrual loans		2,636	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		350	410
Troubled Debt Restructurings, excluding non-accrual loans	[1]	0	0
Past due 90-days-or-more and still accruing interest		151	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.