Note 4 - Loans - Age Analysis of Past Due Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	$ 1,717,630	$ 1,721,812
Financing Receivable, 90 Days or More Past Due, Still Accruing	181	90
Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	1,436	3,335
Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	282	257
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	2,903	2,940
Financial Asset, Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	4,621	6,532
Financial Asset, Not Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	1,713,009	1,715,280
Commercial and Industrial Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	112,689	118,611
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	114	666
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	114	666
Commercial and Industrial Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	112,575	117,945
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	1,108,360	1,112,132
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	217,052	210,327
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	505,518	508,531
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	37,057	37,860
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	265,334	264,260
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	83,399	91,154
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	187	0
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	0	460
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	0
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	2,687	2,642
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	0
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	2,874	2,642
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Farmland [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0	460
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	217,052	210,327
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	502,644	505,889
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Farmland [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	37,057	37,400
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	265,334	264,260
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	83,399	91,154
Residential Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	464,184	457,099
Residential Portfolio Segment [Member] | Secured By Senior Liens On 1-4 Family Dwellings [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	397,209	392,513
Financing Receivable, 90 Days or More Past Due, Still Accruing	102	57
Residential Portfolio Segment [Member] | Secured By Junior Liens on 1-4 Family Dwellings [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	21,481	21,522
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	45,494	43,064
Financing Receivable, 90 Days or More Past Due, Still Accruing	76	33
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	912	1,948
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	0
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	49	72
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	269	249
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	0	8
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	10	0
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	110	237
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	76	33
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	1,291	2,434
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	0	8
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	135	105
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	395,918	390,079
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	21,481	21,514
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	45,359	42,959
Consumer Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	19,054	20,498
Financing Receivable, 90 Days or More Past Due, Still Accruing	3	0
Consumer Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	41	10
Consumer Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	3	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	30	28
Consumer Portfolio Segment [Member] | Financial Asset, Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	74	38
Consumer Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	18,980	20,460
Agricultural Portfolio [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	13,210	13,293
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	13,210	13,293
Other Loans [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	133	179
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	133	179
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	133	179
Other Loans [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	$ 0	$ 0