Note 4 - Loans Receivable, Net - Loans in Nonaccrual Status (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Nonaccrual with no allowance	$ 6,825
Nonaccrual with an allowance	0
Nonaccrual	6,825	$ 6,272
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Nonaccrual with no allowance	868
Nonaccrual with an allowance	0
Nonaccrual	868	115
Commercial Real Estate Portfolio Segment [Member] | Residential Mortgage [Member]
Nonaccrual with no allowance	1,307
Nonaccrual with an allowance	0
Nonaccrual	1,307	1,545
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member]
Nonaccrual with no allowance	4,125
Nonaccrual with an allowance	0
Nonaccrual	4,125	4,282
Commercial and Agricultural Loans [Member]
Nonaccrual with no allowance	50
Nonaccrual with an allowance	0
Nonaccrual	50	113
Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member]
Nonaccrual with no allowance	413
Nonaccrual with an allowance	0
Nonaccrual	413	188
Consumer Portfolio Segment [Member] | Other Consumer Loans [Member]
Nonaccrual with no allowance	62
Nonaccrual with an allowance	0
Nonaccrual	$ 62	$ 29