Note 5 - Collateral-dependent Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Commercial Portfolio Segment [Member] | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Real Estate Secured	$ 0	$ 0
Other	0	278
Deficiency in Collateral	27	33
Total Collateral Dependent Nonaccrual Loans	27	311
Commercial Portfolio Segment [Member] | Construction and Land Development [Member]
Financing Receivable, Past Due [Line Items]
Real Estate Secured	0	0
Other	0	0
Deficiency in Collateral	0	0
Total Collateral Dependent Nonaccrual Loans	0	0
Commercial Portfolio Segment [Member] | Real Estate Secured by Multi-family Properties [Member]
Financing Receivable, Past Due [Line Items]
Real Estate Secured	0	0
Other	0	0
Deficiency in Collateral	0	0
Total Collateral Dependent Nonaccrual Loans	0	0
Commercial Portfolio Segment [Member] | Real estate secured by owner-occupied properties
Financing Receivable, Past Due [Line Items]
Real Estate Secured	157	175
Other	0	0
Deficiency in Collateral	0	0
Total Collateral Dependent Nonaccrual Loans	157	175
Commercial Portfolio Segment [Member] | Real Estate Secured by Other Commercial Properties [Member]
Financing Receivable, Past Due [Line Items]
Real Estate Secured	0	0
Other	0	0
Deficiency in Collateral	0	0
Total Collateral Dependent Nonaccrual Loans	0	0
Commercial Portfolio Segment [Member] | Revolving real estate secured by 1-4 family properties-business [Member]
Financing Receivable, Past Due [Line Items]
Real Estate Secured	0	0
Other	0	0
Deficiency in Collateral	0	0
Total Collateral Dependent Nonaccrual Loans	0	0
Commercial Portfolio Segment [Member] | Real estate secured by 1st lein on 1-4 family properties-business
Financing Receivable, Past Due [Line Items]
Real Estate Secured	205	0
Other	0
Deficiency in Collateral	0
Total Collateral Dependent Nonaccrual Loans	205	0
Commercial Portfolio Segment [Member] | Real estate secured by junior lein on 1-4 family properties-business
Financing Receivable, Past Due [Line Items]
Real Estate Secured	0	0
Other	0	0
Deficiency in Collateral	330	165
Total Collateral Dependent Nonaccrual Loans	330	165
Commercial Portfolio Segment [Member] | State and Political Subdivisions [Member]
Financing Receivable, Past Due [Line Items]
Real Estate Secured	0	0
Other	0	0
Deficiency in Collateral	0	0
Total Collateral Dependent Nonaccrual Loans	0	0
Retail Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Real Estate Secured	1,578	1,300
Other	29	315
Deficiency in Collateral	357	308
Total Collateral Dependent Nonaccrual Loans	1,964	1,923
Retail Portfolio Segment [Member] | Family Residential Mortgages [Member]
Financing Receivable, Past Due [Line Items]
Real Estate Secured	768	805
Other	0	0
Deficiency in Collateral	0	0
Total Collateral Dependent Nonaccrual Loans	768	805
Retail Portfolio Segment [Member] | Revolving home equity secured by 1-4 family properties-personal
Financing Receivable, Past Due [Line Items]
Real Estate Secured	313	185
Other	0	0
Deficiency in Collateral	0	110
Total Collateral Dependent Nonaccrual Loans	313	295
Retail Portfolio Segment [Member] | Real Estate Secured By 1st Lein on 1-4 Family Properties-Personal
Financing Receivable, Past Due [Line Items]
Real Estate Secured	118	116
Other	0	0
Deficiency in Collateral	0	0
Total Collateral Dependent Nonaccrual Loans	118	116
Retail Portfolio Segment [Member] | Real estate secured by junior lein on 1-4 family properties-personal
Financing Receivable, Past Due [Line Items]
Real Estate Secured	17	19
Other	0	0
Deficiency in Collateral	0	0
Total Collateral Dependent Nonaccrual Loans	17	19
Retail Portfolio Segment [Member] | Other Consumer [Member]
Financing Receivable, Past Due [Line Items]
Real Estate Secured	0	0
Other	29	37
Deficiency in Collateral	0	0
Total Collateral Dependent Nonaccrual Loans	$ 29	$ 37