Note 5 - Collateral-dependent Loans By Loan Category (Details) $ in Thousands	Dec. 31, 2023 USD ($)
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Financing Receivable, Past Due [Line Items]
Real Estate Secured	$ 0
Other	278
Deficiency in Collateral	33
Total Collateral Dependent Nonaccrual Loans	311
Commercial Portfolio Segment [Member] | Construction and Land Development [Member]
Financing Receivable, Past Due [Line Items]
Real Estate Secured	0
Other	0
Deficiency in Collateral	0
Total Collateral Dependent Nonaccrual Loans	0
Commercial Portfolio Segment [Member] | Real Estate Secured by Multi-Family Properties [Member]
Financing Receivable, Past Due [Line Items]
Real Estate Secured	0
Other	0
Deficiency in Collateral	0
Total Collateral Dependent Nonaccrual Loans	0
Commercial Portfolio Segment [Member] | Real Estate Secured By Owner-Occupied Properties [Member]
Financing Receivable, Past Due [Line Items]
Real Estate Secured	175
Other	0
Deficiency in Collateral	0
Total Collateral Dependent Nonaccrual Loans	175
Commercial Portfolio Segment [Member] | Real Estate Secured by Other Commercial Properties [Member]
Financing Receivable, Past Due [Line Items]
Real Estate Secured	0
Other	0
Deficiency in Collateral	0
Total Collateral Dependent Nonaccrual Loans	0
Commercial Portfolio Segment [Member] | Revolving real estate secured by 1-4 family properties-business
Financing Receivable, Past Due [Line Items]
Real Estate Secured	0
Other
Deficiency in Collateral
Total Collateral Dependent Nonaccrual Loans	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	0
Total Collateral Dependent Nonaccrual Loans	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
Other	0
Deficiency in Collateral	165
Total Collateral Dependent Nonaccrual Loans	165
Commercial Portfolio Segment [Member] | State and Political Subdivisions [Member]
Financing Receivable, Past Due [Line Items]
Real Estate Secured	0
Other	0
Deficiency in Collateral	0
Total Collateral Dependent Nonaccrual Loans	0
Retail Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Real Estate Secured	1,300
Other	315
Deficiency in Collateral	308
Total Collateral Dependent Nonaccrual Loans	1,923
Retail Portfolio Segment [Member] | Family Residential Mortgages [Member]
Financing Receivable, Past Due [Line Items]
Real Estate Secured	805
Other	0
Deficiency in Collateral	0
Total Collateral Dependent Nonaccrual Loans	805
Retail Portfolio Segment [Member] | Construction - Individual [Member]
Financing Receivable, Past Due [Line Items]
Real Estate Secured	0
Other	0
Deficiency in Collateral	0
Total Collateral Dependent Nonaccrual Loans	0
Retail Portfolio Segment [Member] | Revolving home equity secured by 1-4 family properties-personal
Financing Receivable, Past Due [Line Items]
Real Estate Secured	185
Other	0
Deficiency in Collateral	110
Total Collateral Dependent Nonaccrual Loans	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	116
Other	0
Deficiency in Collateral	0
Total Collateral Dependent Nonaccrual Loans	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	19
Other
Deficiency in Collateral	0
Total Collateral Dependent Nonaccrual Loans	19
Retail Portfolio Segment [Member] | Other Consumer [Member]
Financing Receivable, Past Due [Line Items]
Real Estate Secured
Other	37
Deficiency in Collateral	0
Total Collateral Dependent Nonaccrual Loans	$ 37