Note 1 - Accounting Policies - Summary of Accounting Standards Update (Details) - USD ($) $ in Thousands		Mar. 31, 2023	Jan. 01, 2023	Dec. 31, 2022		Mar. 31, 2022	Dec. 31, 2021
Allowance for credit losses -loans		$ 24,861		$ 19,555		$ 17,988	$ 18,678
Deferred Tax Asset				5,315
Allowance for unfunded commitments				377
Retained earnings		225,409		223,664	[1]
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance for credit losses -loans			$ 5,200	5,192			0
Deferred Tax Asset			1,200
Allowance for unfunded commitments			305
Retained earnings			(4,200)
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Allowance for credit losses -loans			205
Deferred Tax Asset			0
Allowance for unfunded commitments			0
Retained earnings			0
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration [Member]
Allowance for credit losses -loans			4,987
Deferred Tax Asset			1,164
Allowance for unfunded commitments			305
Retained earnings			(4,221)
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Allowance for credit losses -loans			24,747
Deferred Tax Asset			6,479
Allowance for unfunded commitments			682
Retained earnings			219,443
Commercial Portfolio Segment [Member]
Allowance for credit losses -loans	[2]	3,676		2,874			2,668
Commercial Portfolio Segment [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance for credit losses -loans				883
Commercial Portfolio Segment [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Allowance for credit losses -loans			0
Commercial Portfolio Segment [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration [Member]
Allowance for credit losses -loans			883
Commercial Portfolio Segment [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Allowance for credit losses -loans			3,757
Commercial Real Estate Portfolio Segment [Member] | Construction and Land Development [Member]
Allowance for credit losses -loans				1,796
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Commercial Real Estate [Member]
Allowance for credit losses -loans		4,841		3,785			3,964
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied Commercial Real Estate [Member]
Allowance for credit losses -loans		9,256		7,184			7,141
Commercial Real Estate Portfolio Segment [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Owner Occupied Commercial Real Estate [Member]
Allowance for credit losses -loans				1,078
Commercial Real Estate Portfolio Segment [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Non-owner Occupied Commercial Real Estate [Member]
Allowance for credit losses -loans				2,069
Commercial Real Estate Portfolio Segment [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Construction and Land Development [Member]
Allowance for credit losses -loans			14
Commercial Real Estate Portfolio Segment [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Owner Occupied Commercial Real Estate [Member]
Allowance for credit losses -loans			110
Commercial Real Estate Portfolio Segment [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Non-owner Occupied Commercial Real Estate [Member]
Allowance for credit losses -loans			30
Commercial Real Estate Portfolio Segment [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration [Member] | Construction and Land Development [Member]
Allowance for credit losses -loans			258
Commercial Real Estate Portfolio Segment [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration [Member] | Owner Occupied Commercial Real Estate [Member]
Allowance for credit losses -loans			968
Commercial Real Estate Portfolio Segment [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration [Member] | Non-owner Occupied Commercial Real Estate [Member]
Allowance for credit losses -loans			2,039
Commercial Real Estate Portfolio Segment [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Construction and Land Development [Member]
Allowance for credit losses -loans			2,068
Commercial Real Estate Portfolio Segment [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Owner Occupied Commercial Real Estate [Member]
Allowance for credit losses -loans			4,863
Commercial Real Estate Portfolio Segment [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Non-owner Occupied Commercial Real Estate [Member]
Allowance for credit losses -loans			9,253
Residential Portfolio Segment [Member]
Allowance for credit losses -loans				3,867			3,458
Residential Portfolio Segment [Member] | Residential [Member]
Allowance for credit losses -loans		3,754		3,077
Residential Portfolio Segment [Member] | Home Equity Line of Credit [Member]
Allowance for credit losses -loans		964		790
Residential Portfolio Segment [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Residential [Member]
Allowance for credit losses -loans				653
Residential Portfolio Segment [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Home Equity Line of Credit [Member]
Allowance for credit losses -loans				190
Residential Portfolio Segment [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential [Member]
Allowance for credit losses -loans			41
Residential Portfolio Segment [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Home Equity Line of Credit [Member]
Allowance for credit losses -loans			3
Residential Portfolio Segment [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration [Member] | Residential [Member]
Allowance for credit losses -loans			612
Residential Portfolio Segment [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration [Member] | Home Equity Line of Credit [Member]
Allowance for credit losses -loans			187
Residential Portfolio Segment [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Residential [Member]
Allowance for credit losses -loans			3,730
Residential Portfolio Segment [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Home Equity Line of Credit [Member]
Allowance for credit losses -loans			980
Consumer Portfolio Segment [Member]
Allowance for credit losses -loans		$ 90		49			$ 50
Consumer Portfolio Segment [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance for credit losses -loans				$ 47
Consumer Portfolio Segment [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Allowance for credit losses -loans			7
Consumer Portfolio Segment [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration [Member]
Allowance for credit losses -loans			40
Consumer Portfolio Segment [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Allowance for credit losses -loans			$ 96

[1] Derived from audited consolidated financial statements

[2] Includes PPP loans, which are guaranteed by the SBA and have no related allowance.