Note 6 - Loans and the Allowance for Loan Losses - Individually Evaluated Loans and Allowance (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jan. 01, 2023	Dec. 31, 2022
Loans balance	$ 8,794	$ 12,086	$ 14,707
Specific allocations	528	4,210	2,214
Commercial Real Estate Portfolio Segment [Member] | Commercial [Member]
Loans balance	4,877	3,008	3,053
Specific allocations	0	1,915	59
Commercial Real Estate Portfolio Segment [Member] | Construction and Land [Member]
Loans balance	2,350	1,424
Specific allocations	528	513
Commercial Real Estate Portfolio Segment [Member] | Residential [Member]
Loans balance			4,028
Specific allocations			99
Residential Portfolio Segment [Member] | Residential [Member]
Loans balance	1,567	1,558
Specific allocations	0	3
Real Estate Portfolio Segment [Member]
Loans balance	8,794	5,990
Specific allocations	528	2,431
Commercial Portfolio Segment [Member]
Loans balance	0	6,096	6,442
Specific allocations	0	1,779	2,020
Consumer Portfolio Segment [Member]
Loans balance	0	0	192
Specific allocations	$ 0	$ 0	$ 15