Note 3 - Loans and Allowance for Credit Losses on Loans - Non-accrual Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Non-accrual with no allowance	$ 6,263	$ 2,975
Non-accrual loans	17,371	19,058
Troubled Debt Restructurings, excluding non-accrual loans	186	110
Home Equity Line of Credit [Member]
Non-accrual with no allowance	312	343
Non-accrual loans	563	467
Troubled Debt Restructurings, excluding non-accrual loans	0	0
Credit Cards [Member]
Non-accrual with no allowance	0	0
Non-accrual loans	46	10
Troubled Debt Restructurings, excluding non-accrual loans	137	110
Commercial Real Estate Portfolio Segment [Member]
Non-accrual with no allowance	998	1,714
Non-accrual loans	3,310	9,534
Troubled Debt Restructurings, excluding non-accrual loans	0	0
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member]
Non-accrual with no allowance	310	1,714
Non-accrual loans	1,574	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	1,736	885
Troubled Debt Restructurings, excluding non-accrual loans	0	0
Commercial and Industrial Portfolio Segment [Member]
Non-accrual with no allowance	4,401
Non-accrual loans	6,953
Troubled Debt Restructurings, excluding non-accrual loans	49
Commercial and Industrial Portfolio Segment [Member] | Term [Member]
Non-accrual with no allowance	4,401	688
Non-accrual loans	6,953	4,456
Troubled Debt Restructurings, excluding non-accrual loans	0	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	49	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	552	230
Non-accrual loans	6,127	4,039
Troubled Debt Restructurings, excluding non-accrual loans	0	0
Residential Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member]
Non-accrual with no allowance	0	0
Non-accrual loans	546	372
Troubled Debt Restructurings, excluding non-accrual loans	0	0
Residential Real Estate Portfolio Segment [Member] | Owner Occupied [Member]
Non-accrual with no allowance	552	230
Non-accrual loans	5,581	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	372	337
Troubled Debt Restructurings, excluding non-accrual loans	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	$ 0	$ 0