Note 3 - Loans and Allowance for Credit Losses on Loans - Non-accrual Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Non-accrual with no allowance	$ 5,664	$ 2,975
Non-accrual loans	16,288	19,058
Troubled Debt Restructurings, excluding non-accrual loans	870	110
Home Equity Line of Credit [Member]
Non-accrual with no allowance	0	343
Non-accrual loans	90	467
Troubled Debt Restructurings, excluding non-accrual loans	0	0
Credit Cards [Member]
Non-accrual with no allowance	0	0
Non-accrual loans	0	10
Troubled Debt Restructurings, excluding non-accrual loans	99	110
Commercial Real Estate Portfolio Segment [Member]
Non-accrual with no allowance	992	1,714
Non-accrual loans	2,554	9,534
Troubled Debt Restructurings, excluding non-accrual loans	90	0
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member]
Non-accrual with no allowance	304	1,714
Non-accrual loans	1,055	8,649
Troubled Debt Restructurings, excluding non-accrual loans	0	0
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied [Member]
Non-accrual with no allowance	688	0
Non-accrual loans	1,499	885
Troubled Debt Restructurings, excluding non-accrual loans	90	0
Commercial and Industrial Portfolio Segment [Member]
Non-accrual with no allowance	4,174
Non-accrual loans	6,260
Troubled Debt Restructurings, excluding non-accrual loans	548
Commercial and Industrial Portfolio Segment [Member] | Term [Member]
Non-accrual with no allowance	4,174	688
Non-accrual loans	6,260	4,456
Troubled Debt Restructurings, excluding non-accrual loans	548	0
Commercial and Industrial Portfolio Segment [Member] | Lines of Credit [Member]
Non-accrual with no allowance	0	0
Non-accrual loans	0	215
Troubled Debt Restructurings, excluding non-accrual loans	0	0
Total Commercial and Industrial Portfolio Segment [Member]
Non-accrual with no allowance		688
Non-accrual loans		4,671
Troubled Debt Restructurings, excluding non-accrual loans		0
Residential Real Estate Portfolio Segment [Member]
Non-accrual with no allowance	498	230
Non-accrual loans	7,054	4,039
Troubled Debt Restructurings, excluding non-accrual loans	128	0
Residential Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member]
Non-accrual with no allowance	0	0
Non-accrual loans	540	372
Troubled Debt Restructurings, excluding non-accrual loans	128	0
Residential Real Estate Portfolio Segment [Member] | Owner Occupied [Member]
Non-accrual with no allowance	498	230
Non-accrual loans	6,514	3,667
Troubled Debt Restructurings, excluding non-accrual loans	0	0
Construction and Development [Member]
Non-accrual with no allowance	0	0
Non-accrual loans	0	0
Troubled Debt Restructurings, excluding non-accrual loans	0	0
Consumer Portfolio Segment [Member]
Non-accrual with no allowance	0	0
Non-accrual loans	330	337
Troubled Debt Restructurings, excluding non-accrual loans	5	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	$ 0	$ 0