Note 1 - Significant Accounting Policies - Reconciliation of Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Income	$ 10,190	$ 10,228
Weighted Average Shares Outstanding (Basic) (in shares)	3,248,149	3,252,884
Net Income Per Common Share (Basic) (in dollars per share)	$ 3.14	$ 3.14