Note 8 - Collateral-dependent Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Commercial Portfolio Segment [Member] | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Real Estate Secured	$ 0	$ 0
Other	252	278
Deficiency in Collateral	32	33
Total Collateral Dependent Nonaccrual Loans	284	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	348	175
Other	0	0
Deficiency in Collateral	0	0
Total Collateral Dependent Nonaccrual Loans	348	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	0	0
Total Collateral Dependent Nonaccrual Loans	0	0
Commercial Portfolio Segment [Member] | Real estate secured by junior lein on 1-4 family properties-business [Member]
Financing Receivable, Past Due [Line Items]
Real Estate Secured	0	0
Other	0	0
Deficiency in Collateral	0	165
Total Collateral Dependent Nonaccrual Loans	0	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	1,566	1,300
Other	287	315
Deficiency in Collateral	137	308
Total Collateral Dependent Nonaccrual Loans	1,990	1,923
Retail Portfolio Segment [Member] | Family Residential Mortgages [Member]
Financing Receivable, Past Due [Line Items]
Real Estate Secured	904	805
Other	0	0
Deficiency in Collateral	0	0
Total Collateral Dependent Nonaccrual Loans	904	805
Retail Portfolio Segment [Member] | Construction-individual [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] | Revolving home equity secured by 1-4 family properties-personal
Financing Receivable, Past Due [Line Items]
Real Estate Secured	185	185
Other	0	0
Deficiency in Collateral	105	110
Total Collateral Dependent Nonaccrual Loans	290	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	111	116
Other	0	0
Deficiency in Collateral	0	0
Total Collateral Dependent Nonaccrual Loans	111	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	18	19
Other	0	0
Deficiency in Collateral	0	0
Total Collateral Dependent Nonaccrual Loans	18	19
Retail Portfolio Segment [Member] | Other Consumer [Member]
Financing Receivable, Past Due [Line Items]
Real Estate Secured	0	0
Other	35	37
Deficiency in Collateral	0	0
Total Collateral Dependent Nonaccrual Loans	$ 35	$ 37