Note 4 - Loans Receivable, Net - Summary of Collateral Dependent Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Loans	$ 634,496	$ 560,988
Collateral Pledged [Member]
Loans	5,210
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Loans	104,508	112,794
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Collateral Pledged [Member]
Loans	643
Commercial Real Estate Portfolio Segment [Member] | Residential Mortgage [Member]
Loans	172,883	110,057
Commercial Real Estate Portfolio Segment [Member] | Residential Mortgage [Member] | Collateral Pledged [Member]
Loans	668
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member]
Loans	264,802	252,154
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Collateral Pledged [Member]
Loans	3,567
Commercial and Agricultural Loans [Member]
Loans	33,286	30,648
Commercial and Agricultural Loans [Member] | Collateral Pledged [Member]
Loans	0
Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member]
Loans	34,497	31,737
Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member] | Collateral Pledged [Member]
Loans	332
Consumer Portfolio Segment [Member] | Other Consumer Loans [Member]
Loans	24,520	$ 23,598
Consumer Portfolio Segment [Member] | Other Consumer Loans [Member] | Collateral Pledged [Member]
Loans	$ 0