Note 3 - Loans and Allowance for Loan Losses - Nonaccrual Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
With no related allowance recorded, principal balance	$ 2,474	$ 2,342
With related allowance recorded, principal balance	3,565	1,073
Related allowance	2,379	241
Total principal balance	6,039	3,415
Commercial Portfolio Segment [Member]
With no related allowance recorded, principal balance	16	70
With related allowance recorded, principal balance	2,652	249
Related allowance	2,050	1
Total principal balance	2,668	319
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
With no related allowance recorded, principal balance	16	0
With related allowance recorded, principal balance	2,652	249
Related allowance	2,050	1
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
With no related allowance recorded, principal balance	0	0
With related allowance recorded, principal balance	0	0
Related allowance	0	0
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member]
With no related allowance recorded, principal balance	0	70
With related allowance recorded, principal balance	0	0
Related allowance	0	0
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member]
With no related allowance recorded, principal balance	0	0
With related allowance recorded, principal balance	0	0
Related allowance	0	0
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
With no related allowance recorded, principal balance	0	0
With related allowance recorded, principal balance	0	0
Related allowance	0	0
Retail Portfolio Segment [Member]
With no related allowance recorded, principal balance	2,458	2,272
With related allowance recorded, principal balance	913	824
Related allowance	329	240
Total principal balance	3,371	3,096
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member]
With no related allowance recorded, principal balance	2,431	2,272
With related allowance recorded, principal balance	805	824
Related allowance	221	240
Retail Portfolio Segment [Member] | Other Consumer Loans [Member]
With no related allowance recorded, principal balance	27	0
With related allowance recorded, principal balance	108	0
Related allowance	$ 108	$ 0