Note 8 - Non-accrual Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable		$ 0
Loans receivable		7,530
Commercial Portfolio Segment [Member] | Commercial and industrial
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	$ 0	0
Loans receivable	391	3,369
Commercial Portfolio Segment [Member] | Commercial and industrial | Nonaccrual With No Specifically-Related ACL
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0
Commercial Portfolio Segment [Member] | Commercial and industrial | Nonaccrual With Related ACL
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	391
Commercial Portfolio Segment [Member] | Construction and Land Development [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0
Loans receivable	0
Commercial Portfolio Segment [Member] | Construction and Land Development [Member] | Nonaccrual With No Specifically-Related ACL
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0
Commercial Portfolio Segment [Member] | Construction and Land Development [Member] | Nonaccrual With Related ACL
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0
Commercial Portfolio Segment [Member] | Real Estate Secured by Multi-family Properties [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0
Loans receivable	0
Commercial Portfolio Segment [Member] | Real Estate Secured by Multi-family Properties [Member] | Nonaccrual With No Specifically-Related ACL
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0
Commercial Portfolio Segment [Member] | Real Estate Secured by Multi-family Properties [Member] | Nonaccrual With Related ACL
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0
Commercial Portfolio Segment [Member] | Real estate secured by owner-occupied properties [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0
Loans receivable	825
Commercial Portfolio Segment [Member] | Real estate secured by owner-occupied properties [Member] | Nonaccrual With No Specifically-Related ACL
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	825
Commercial Portfolio Segment [Member] | Real estate secured by owner-occupied properties [Member] | Nonaccrual With Related ACL
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0
Commercial Portfolio Segment [Member] | Real Estate Secured by Other Commercial Properties [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0
Loans receivable	2,263
Commercial Portfolio Segment [Member] | Real Estate Secured by Other Commercial Properties [Member] | Nonaccrual With No Specifically-Related ACL
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	2,263
Commercial Portfolio Segment [Member] | Real Estate Secured by Other Commercial Properties [Member] | Nonaccrual With Related ACL
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0
Commercial Portfolio Segment [Member] | Revolving real estate secured by 1-4 family properties-business
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0
Loans receivable	0
Commercial Portfolio Segment [Member] | Revolving real estate secured by 1-4 family properties-business | Nonaccrual With No Specifically-Related ACL
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0
Commercial Portfolio Segment [Member] | Revolving real estate secured by 1-4 family properties-business | Nonaccrual With Related ACL
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0
Commercial Portfolio Segment [Member] | Real estate secured by 1st lein on 1-4 family properties-business
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0
Loans receivable	9
Commercial Portfolio Segment [Member] | Real estate secured by 1st lein on 1-4 family properties-business | Nonaccrual With No Specifically-Related ACL
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	9
Commercial Portfolio Segment [Member] | Real estate secured by 1st lein on 1-4 family properties-business | Nonaccrual With Related ACL
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0
Commercial Portfolio Segment [Member] | Real estate secured by junior lein on 1-4 family properties-business
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0
Loans receivable	245
Commercial Portfolio Segment [Member] | Real estate secured by junior lein on 1-4 family properties-business | Nonaccrual With No Specifically-Related ACL
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0
Commercial Portfolio Segment [Member] | Real estate secured by junior lein on 1-4 family properties-business | Nonaccrual With Related ACL
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	245
Commercial Portfolio Segment [Member] | State and Political Subdivisions [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0
Loans receivable	0
Commercial Portfolio Segment [Member] | State and Political Subdivisions [Member] | Nonaccrual With No Specifically-Related ACL
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0
Commercial Portfolio Segment [Member] | State and Political Subdivisions [Member] | Nonaccrual With Related ACL
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0
Commercial Portfolio Segment [Member] | Construction Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable		0
Loans receivable		0
Commercial Portfolio Segment [Member] | Secured by Commercial Real Estate [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable		0
Loans receivable		2,279
Commercial Portfolio Segment [Member] | Secured by Residential Real Estate [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable		0
Loans receivable		391
State and Political Subdivisions Portfolio Segment [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable		0
Loans receivable		0
Retail Portfolio Segment [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0
Loans receivable	4,561
Retail Portfolio Segment [Member] | Consumer Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable		0
Loans receivable		90
Retail Portfolio Segment [Member] | Nonaccrual With No Specifically-Related ACL
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	3,767
Retail Portfolio Segment [Member] | Nonaccrual With Related ACL
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	794
Retail Portfolio Segment [Member] | 1-4 Family Residential Mortgages [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0
Loans receivable	448
Retail Portfolio Segment [Member] | 1-4 Family Residential Mortgages [Member] | Nonaccrual With No Specifically-Related ACL
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	448
Retail Portfolio Segment [Member] | 1-4 Family Residential Mortgages [Member] | Nonaccrual With Related ACL
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0
Retail Portfolio Segment [Member] | Construction-individual [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0
Loans receivable	0
Retail Portfolio Segment [Member] | Construction-individual [Member] | Nonaccrual With No Specifically-Related ACL
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0
Retail Portfolio Segment [Member] | Construction-individual [Member] | Nonaccrual With Related ACL
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0
Retail Portfolio Segment [Member] | Revolving home equity secured by 1-4 family properties-personal
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0
Loans receivable	183
Retail Portfolio Segment [Member] | Revolving home equity secured by 1-4 family properties-personal | Nonaccrual With No Specifically-Related ACL
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	25
Retail Portfolio Segment [Member] | Revolving home equity secured by 1-4 family properties-personal | Nonaccrual With Related ACL
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	158
Retail Portfolio Segment [Member] | Real Estate Secured By Junior Lein on 1-4 Family Properties-Personal [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0
Loans receivable	137
Retail Portfolio Segment [Member] | Real Estate Secured By Junior Lein on 1-4 Family Properties-Personal [Member] | Nonaccrual With No Specifically-Related ACL
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	137
Retail Portfolio Segment [Member] | Real Estate Secured By Junior Lein on 1-4 Family Properties-Personal [Member] | Nonaccrual With Related ACL
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0
Retail Portfolio Segment [Member] | Real estate secured by junior lein on 1-4 family properties-personal
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0
Loans receivable	0
Retail Portfolio Segment [Member] | Real estate secured by junior lein on 1-4 family properties-personal | Nonaccrual With No Specifically-Related ACL
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0
Retail Portfolio Segment [Member] | Student Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0
Loans receivable	17
Retail Portfolio Segment [Member] | Student Loans [Member] | Nonaccrual With No Specifically-Related ACL
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	17
Retail Portfolio Segment [Member] | Student Loans [Member] | Nonaccrual With Related ACL
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0
Retail Portfolio Segment [Member] | Other Consumer [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	0
Loans receivable	43
Retail Portfolio Segment [Member] | Other Consumer [Member] | Nonaccrual With No Specifically-Related ACL
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	43
Retail Portfolio Segment [Member] | Other Consumer [Member] | Nonaccrual With Related ACL
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable	$ 0
Retail Portfolio Segment [Member] | Family Residential Mortgages [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable		0
Loans receivable		721
Retail Portfolio Segment [Member] | Home Equity Loans and Lines [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans receivable		0
Loans receivable		$ 680