Note 8 - Loans Receivable, Net - Loans in Nonaccrual Status (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Nonaccrual with no allowance	$ 6,635	$ 6,825
Nonaccrual with an allowance	0	0
Nonaccrual	6,635	6,825
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Nonaccrual with no allowance	836	868
Nonaccrual with an allowance	0	0
Nonaccrual	836	868
Commercial Real Estate Portfolio Segment [Member] | Residential Mortgage [Member]
Nonaccrual with no allowance	1,213	1,307
Nonaccrual with an allowance	0	0
Nonaccrual	1,213	1,307
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member]
Nonaccrual with no allowance	3,989	4,125
Nonaccrual with an allowance	0	0
Nonaccrual	3,989	4,125
Commercial and Agricultural Loans [Member]
Nonaccrual with no allowance	73	50
Nonaccrual with an allowance	0	0
Nonaccrual	73	50
Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member]
Nonaccrual with no allowance	402	413
Nonaccrual with an allowance	0	0
Nonaccrual	402	413
Consumer Portfolio Segment [Member] | Other Consumer Loans [Member]
Nonaccrual with no allowance	122	62
Nonaccrual with an allowance	0	0
Nonaccrual	$ 122	$ 62