Note 1 - Summary of Significant Accounting Policies - Impact of Adoption (Details) - USD ($) $ in Thousands		12 Months Ended
	Jan. 01, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounting Standards Update [Extensible Enumeration]	us-gaap:AccountingStandardsUpdate201613Member	us-gaap:AccountingStandardsUpdate201613Member
Loans		$ 1,093,771	$ 1,039,637
Allowance for credit losses on loans (ACL)	$ (9,442)
Deferred tax assets	4,540	20,931	24,728
Liabilities:
Allowance for credit losses on unused commitments	122
Equity:
Retained earnings	129,808	133,945	128,951
State and Political Subdivisions [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans		18,708
Commercial Portfolio Segment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans		919,415
Commercial Portfolio Segment [Member] | Construction-individual [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans		0
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans		137,086	$ 160,875	$ 160,875
Allowance for credit losses on loans (ACL)	(1,246)
Commercial Portfolio Segment [Member] | Construction and Land Development [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans		116,173
Allowance for credit losses on loans (ACL)	(745)
Commercial Portfolio Segment [Member] | Real Estate Secured by Multi-family Properties [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans		109,193
Allowance for credit losses on loans (ACL)	(1,679)
Commercial Portfolio Segment [Member] | Real Estate Secured By Owner-Occupied Properties [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans		160,695
Allowance for credit losses on loans (ACL)	(1,175)
Commercial Portfolio Segment [Member] | Real Estate Secured by Other Commercial Properties [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans		265,101
Allowance for credit losses on loans (ACL)	(1,330)
Commercial Portfolio Segment [Member] | Revolving Real Estate Secured By 1-4 Family Properties-Business [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans		5,442
Allowance for credit losses on loans (ACL)	(32)
Commercial Portfolio Segment [Member] | Real Estate Secured By 1st Lien on 1-4 Family Properties-Business [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans		103,572
Allowance for credit losses on loans (ACL)	(1,700)
Commercial Portfolio Segment [Member] | Real Estate Secured By Junior Lien on 1-4 Family Properties-Business [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans		3,445
Allowance for credit losses on loans (ACL)	(16)
Commercial Portfolio Segment [Member] | State and Political Subdivisions [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans		18,708
Allowance for credit losses on loans (ACL)	(74)
Retail Portfolio Segment [Member] | 1-4 Family Residential Mortgages [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans		108,906
Allowance for credit losses on loans (ACL)	(486)
Retail Portfolio Segment [Member] | Construction-individual [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans		0
Allowance for credit losses on loans (ACL)	(1)
Retail Portfolio Segment [Member] | Revolving Home Equity Secured By 1-4 Family Properties-Personal [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans		34,231
Allowance for credit losses on loans (ACL)	(292)
Retail Portfolio Segment [Member] | Real Estate Secured By First Lein on 1-4 Family Properties-Personal [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans		11,981
Allowance for credit losses on loans (ACL)	(72)
Retail Portfolio Segment [Member] | Real Estate Secured By Junior Lien on 1-4 Family Properties-Personal [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans		15,625
Allowance for credit losses on loans (ACL)	(84)
Retail Portfolio Segment [Member] | Student Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans		1,662
Allowance for credit losses on loans (ACL)	(466)
Retail Portfolio Segment [Member] | Overdrafts [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans		194
Allowance for credit losses on loans (ACL)	(11)
Retail Portfolio Segment [Member] | Other Consumer [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans		$ 1,757
Allowance for credit losses on loans (ACL)	(33)
Unallocated Financing Receivables [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	0
Commercial Loans [Member] | Revolving Real Estate Secured by One to Four Family Properties [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	5,255
Retail Loans [Member] | 1-4 Family Residential Mortgages [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	105,524
Retail Loans [Member] | Construction-individual [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	130
Retail Loans [Member] | Revolving Home Equity Secured by 1-4 Family Properties [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	36,732
Pre-ASC 326 Adoption [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	(10,531)
Deferred tax assets	4,767
Liabilities:
Allowance for credit losses on unused commitments	117
Equity:
Retained earnings	128,951
Pre-ASC 326 Adoption [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	(1,316)
Pre-ASC 326 Adoption [Member] | Commercial Portfolio Segment [Member] | Construction and Land Development [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	(755)
Pre-ASC 326 Adoption [Member] | Commercial Portfolio Segment [Member] | Real Estate Secured by Multi-family Properties [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	(995)
Pre-ASC 326 Adoption [Member] | Commercial Portfolio Segment [Member] | Real Estate Secured By Owner-Occupied Properties [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	(1,549)
Pre-ASC 326 Adoption [Member] | Commercial Portfolio Segment [Member] | Real Estate Secured by Other Commercial Properties [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	(2,458)
Pre-ASC 326 Adoption [Member] | Commercial Portfolio Segment [Member] | Revolving Real Estate Secured By 1-4 Family Properties-Business [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	(25)
Pre-ASC 326 Adoption [Member] | Commercial Portfolio Segment [Member] | Real Estate Secured By 1st Lien on 1-4 Family Properties-Business [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	(1,210)
Pre-ASC 326 Adoption [Member] | Commercial Portfolio Segment [Member] | Real Estate Secured By Junior Lien on 1-4 Family Properties-Business [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	(30)
Pre-ASC 326 Adoption [Member] | Commercial Portfolio Segment [Member] | State and Political Subdivisions [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	(94)
Pre-ASC 326 Adoption [Member] | Retail Portfolio Segment [Member] | 1-4 Family Residential Mortgages [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	105,654
Allowance for credit losses on loans (ACL)	(682)
Pre-ASC 326 Adoption [Member] | Retail Portfolio Segment [Member] | Construction-individual [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	(1)
Pre-ASC 326 Adoption [Member] | Retail Portfolio Segment [Member] | Revolving Home Equity Secured By 1-4 Family Properties-Personal [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	(299)
Pre-ASC 326 Adoption [Member] | Retail Portfolio Segment [Member] | Real Estate Secured By First Lein on 1-4 Family Properties-Personal [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	(57)
Pre-ASC 326 Adoption [Member] | Retail Portfolio Segment [Member] | Real Estate Secured By Junior Lien on 1-4 Family Properties-Personal [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	(55)
Pre-ASC 326 Adoption [Member] | Retail Portfolio Segment [Member] | Student Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	(454)
Pre-ASC 326 Adoption [Member] | Retail Portfolio Segment [Member] | Overdrafts [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	(8)
Pre-ASC 326 Adoption [Member] | Retail Portfolio Segment [Member] | Other Consumer [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	(41)
Pre-ASC 326 Adoption [Member] | Unallocated Financing Receivables [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	(502)
Pre-ASC 326 Adoption [Member] | Retail Loans [Member] | Revolving Home Equity Secured by 1-4 Family Properties [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	41,987
Impact of ASC 326 Adoption [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	1,089
Deferred tax assets	(227)
Liabilities:
Allowance for credit losses on unused commitments	5
Equity:
Retained earnings	857
Impact of ASC 326 Adoption [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	70
Impact of ASC 326 Adoption [Member] | Commercial Portfolio Segment [Member] | Construction and Land Development [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	10
Impact of ASC 326 Adoption [Member] | Commercial Portfolio Segment [Member] | Real Estate Secured by Multi-family Properties [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	(684)
Impact of ASC 326 Adoption [Member] | Commercial Portfolio Segment [Member] | Real Estate Secured By Owner-Occupied Properties [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	374
Impact of ASC 326 Adoption [Member] | Commercial Portfolio Segment [Member] | Real Estate Secured by Other Commercial Properties [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	1,128
Impact of ASC 326 Adoption [Member] | Commercial Portfolio Segment [Member] | Revolving Real Estate Secured By 1-4 Family Properties-Business [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	(7)
Impact of ASC 326 Adoption [Member] | Commercial Portfolio Segment [Member] | Real Estate Secured By 1st Lien on 1-4 Family Properties-Business [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	(490)
Impact of ASC 326 Adoption [Member] | Commercial Portfolio Segment [Member] | Real Estate Secured By Junior Lien on 1-4 Family Properties-Business [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	14
Impact of ASC 326 Adoption [Member] | Commercial Portfolio Segment [Member] | State and Political Subdivisions [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	20
Impact of ASC 326 Adoption [Member] | Retail Portfolio Segment [Member] | 1-4 Family Residential Mortgages [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	196
Impact of ASC 326 Adoption [Member] | Retail Portfolio Segment [Member] | Construction-individual [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	0
Impact of ASC 326 Adoption [Member] | Retail Portfolio Segment [Member] | Revolving Home Equity Secured By 1-4 Family Properties-Personal [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	7
Impact of ASC 326 Adoption [Member] | Retail Portfolio Segment [Member] | Real Estate Secured By First Lein on 1-4 Family Properties-Personal [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	(15)
Impact of ASC 326 Adoption [Member] | Retail Portfolio Segment [Member] | Real Estate Secured By Junior Lien on 1-4 Family Properties-Personal [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	(29)
Impact of ASC 326 Adoption [Member] | Retail Portfolio Segment [Member] | Student Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	(12)
Impact of ASC 326 Adoption [Member] | Retail Portfolio Segment [Member] | Overdrafts [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	(3)
Impact of ASC 326 Adoption [Member] | Retail Portfolio Segment [Member] | Other Consumer [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	8
Impact of ASC 326 Adoption [Member] | Unallocated Financing Receivables [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans (ACL)	502
Impact of ASC 326 Adoption [Member] | Commercial Loans [Member] | Revolving Real Estate Secured by One to Four Family Properties [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	5,255
Impact of ASC 326 Adoption [Member] | Retail Loans [Member] | 1-4 Family Residential Mortgages [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	(130)
Impact of ASC 326 Adoption [Member] | Retail Loans [Member] | Construction-individual [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	130
Impact of ASC 326 Adoption [Member] | Retail Loans [Member] | Revolving Home Equity Secured by 1-4 Family Properties [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	$ (5,255)