Note 5 - Past Due Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	$ 1,039,637	$ 927,147
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	835	3,468
Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	1,375	12
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	229	763
Financing Receivables, Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	2,439	4,243
Current Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	1,037,198	922,904
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	160,875	148,610
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	2,288
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	1,157	1
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	596
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Financing Receivables, Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	1,157	2,885
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Current Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	159,718	145,725
Commercial Portfolio Segment [Member] | Construction Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	62,955	55,855
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	0
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	0
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	0
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Financing Receivables, Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	0
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Current Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	62,955	55,855
Commercial Portfolio Segment [Member] | Secured by Commercial Real Estate [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	518,070	451,404
Commercial Portfolio Segment [Member] | Secured by Commercial Real Estate [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	0
Commercial Portfolio Segment [Member] | Secured by Commercial Real Estate [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	0
Commercial Portfolio Segment [Member] | Secured by Commercial Real Estate [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	0
Commercial Portfolio Segment [Member] | Secured by Commercial Real Estate [Member] | Financing Receivables, Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	0
Commercial Portfolio Segment [Member] | Secured by Commercial Real Estate [Member] | Current Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	518,070	451,404
Commercial Portfolio Segment [Member] | Secured by Residential Real Estate [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	103,419	84,741
Commercial Portfolio Segment [Member] | Secured by Residential Real Estate [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	0
Commercial Portfolio Segment [Member] | Secured by Residential Real Estate [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	0
Commercial Portfolio Segment [Member] | Secured by Residential Real Estate [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	13	30
Commercial Portfolio Segment [Member] | Secured by Residential Real Estate [Member] | Financing Receivables, Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	13	30
Commercial Portfolio Segment [Member] | Secured by Residential Real Estate [Member] | Current Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	103,406	84,711
State and Political Subdivisions Portfolio Segment [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	20,971	19,775
State and Political Subdivisions Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	0
State and Political Subdivisions Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	0
State and Political Subdivisions Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	0
State and Political Subdivisions Portfolio Segment [Member] | Financing Receivables, Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	0
State and Political Subdivisions Portfolio Segment [Member] | Current Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	20,971	19,775
Retail Portfolio Segment [Member] | Consumer Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	4,113	4,699
Retail Portfolio Segment [Member] | Consumer Loans [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	37	20
Retail Portfolio Segment [Member] | Consumer Loans [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	50	11
Retail Portfolio Segment [Member] | Consumer Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	0
Retail Portfolio Segment [Member] | Consumer Loans [Member] | Financing Receivables, Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	87	31
Retail Portfolio Segment [Member] | Consumer Loans [Member] | Current Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	4,026	4,668
Retail Portfolio Segment [Member] | Family Residential Mortgages [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	105,654	100,281
Retail Portfolio Segment [Member] | Family Residential Mortgages [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	703	1,139
Retail Portfolio Segment [Member] | Family Residential Mortgages [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	168	0
Retail Portfolio Segment [Member] | Family Residential Mortgages [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	216	127
Retail Portfolio Segment [Member] | Family Residential Mortgages [Member] | Financing Receivables, Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	1,087	1,266
Retail Portfolio Segment [Member] | Family Residential Mortgages [Member] | Current Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	104,567	99,015
Retail Portfolio Segment [Member] | Home Equity Loans and Lines [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	63,580	61,782
Retail Portfolio Segment [Member] | Home Equity Loans and Lines [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	95	21
Retail Portfolio Segment [Member] | Home Equity Loans and Lines [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	0
Retail Portfolio Segment [Member] | Home Equity Loans and Lines [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	10
Retail Portfolio Segment [Member] | Home Equity Loans and Lines [Member] | Financing Receivables, Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	95	31
Retail Portfolio Segment [Member] | Home Equity Loans and Lines [Member] | Current Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	$ 63,485	$ 61,751