Note 4 - Loans - Age Analysis of Past Due Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Jan. 01, 2023
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	$ 1,721,812	$ 1,723,471	$ 1,401,278
Financing Receivable, 90 Days or More Past Due, Still Accruing	90	72
Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	3,335	4,084
Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	257	444
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	2,940	101
Financial Asset, Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	6,532	4,629
Financial Asset, Not Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	1,715,280	1,718,842
Commercial and Industrial Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	118,611	120,541
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Commercial and Industrial Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	666	0
Commercial and Industrial Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0	0
Commercial and Industrial Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0	0
Commercial and Industrial Portfolio Segment [Member] | Financial Asset, Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	666	0
Commercial and Industrial Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	117,945	120,541
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	1,112,132	1,105,644
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	210,327	206,705
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	72
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	508,531	501,108
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Commercial Real Estate Portfolio Segment [Member] | Farmland [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	37,860	37,367
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Commercial Real Estate Portfolio Segment [Member] | Multifamily Loans [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	264,260	240,033
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	91,154	120,431
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Owner Occupied [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Non-owner Occupied [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0	2,645
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Farmland [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	460	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Multifamily Loans [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Construction Loans [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Owner Occupied [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Non-owner Occupied [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Farmland [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Multifamily Loans [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Construction Loans [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Owner Occupied [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0	72
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Non-owner Occupied [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	2,642	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Farmland [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Multifamily Loans [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Construction Loans [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Owner Occupied [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0	72
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Non-owner Occupied [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	2,642	2,645
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Farmland [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	460	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Multifamily Loans [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Construction Loans [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Owner Occupied [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	210,327	206,633
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Non-owner Occupied [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	505,889	498,463
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Farmland [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	37,400	37,367
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Multifamily Loans [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	264,260	240,033
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Construction Loans [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	91,154	120,431
Residential Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	457,099	460,604
Residential Portfolio Segment [Member] | Secured By Senior Liens On 1-4 Family Dwellings [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	392,513	402,026
Financing Receivable, 90 Days or More Past Due, Still Accruing	57	0
Residential Portfolio Segment [Member] | Secured By Junior Liens on 1-4 Family Dwellings [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	21,522	19,999
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Residential Portfolio Segment [Member] | Home Equity Line-of-credit loans [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	43,064	38,579
Financing Receivable, 90 Days or More Past Due, Still Accruing	33	0
Residential Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Secured By Senior Liens On 1-4 Family Dwellings [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	1,948	1,020
Residential Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Secured By Junior Liens on 1-4 Family Dwellings [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0	27
Residential Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Home Equity Line-of-credit loans [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	72	174
Residential Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Secured By Senior Liens On 1-4 Family Dwellings [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	249	414
Residential Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Secured By Junior Liens on 1-4 Family Dwellings [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	8	0
Residential Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Home Equity Line-of-credit loans [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0	30
Residential Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Secured By Senior Liens On 1-4 Family Dwellings [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	237	29
Residential Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Secured By Junior Liens on 1-4 Family Dwellings [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0	0
Residential Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Home Equity Line-of-credit loans [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	33	0
Residential Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Secured By Senior Liens On 1-4 Family Dwellings [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	2,434	1,463
Residential Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Secured By Junior Liens on 1-4 Family Dwellings [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	8	27
Residential Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Home Equity Line-of-credit loans [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	105	204
Residential Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Secured By Senior Liens On 1-4 Family Dwellings [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	390,079	400,563
Residential Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Secured By Junior Liens on 1-4 Family Dwellings [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	21,514	19,972
Residential Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Home Equity Line-of-credit loans [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	42,959	38,375
Consumer Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	20,498	25,600
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Consumer Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	10	136
Consumer Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0	0
Consumer Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	28	0
Consumer Portfolio Segment [Member] | Financial Asset, Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	38	136
Consumer Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	20,460	25,464
Agricultural Portfolio [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	13,293	11,000
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Agricultural Portfolio [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0	0
Agricultural Portfolio [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0	0
Agricultural Portfolio [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0	0
Agricultural Portfolio [Member] | Financial Asset, Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0	0
Agricultural Portfolio [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	13,293	11,000
Other Loans [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	179	82
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Other Loans [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	179	82
Other Loans [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0	0
Other Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0	0
Other Loans [Member] | Financial Asset, Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	179	82
Other Loans [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	$ 0	$ 0