Note 18 - Employee Benefit Plans (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan, Requisite Service Period (Year)	1 year
Defined Benefit Plan, Accumulated Benefit Obligation	$ 3,500,000	$ 3,300,000	$ 5,000,000
Defined Benefit Plan, Maximum Percentage of Limiting Equities	5.00%
Defined Contribution Plan, Employer Matching Contribution, Service Requirement (Year)	1 year
Defined Contribution Plan, Cost	$ 1,400,000	1,200,000	1,100,000
Deferred Compensation Arrangement with Individual, Maximum Contractual Term (Year)	10 years
Deferred Compensation Arrangement with Individual, Recorded Liability	$ 50,000	100,000
Deferred Compensation Arrangement with Individual, Compensation Expense	0	0	0
Profit Sharing and Deferred Compensation Arrangements Expense	90,000	86,000	184,000
Profit Sharing and Incentive Arrangements Expense	3,300,000	5,100,000	3,100,000
HomeTown Bankshares Corporation [Member]
Deferred Compensation Arrangement with Individual, Recorded Liability	4,800,000	5,400,000
Deferred Compensation Arrangement with Individual, Compensation Expense	143,000	$ 159,000	$ 430,000
Minimum [Member]
Deferred Compensation Arrangement with Individual, Contributions by Employer	25,000
Maximum [Member]
Deferred Compensation Arrangement with Individual, Contributions by Employer	$ 50,000