Note 4 - Earnings Per Share - Summary of Basic EPS (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Basic EPS, income	$ 1,778,197	$ 2,163,803	$ 4,452,297	$ 3,712,834
Weighted Average Shares Outstanding (Basic) (in shares)	3,253,736	3,252,884	3,253,736	3,252,884
Net Income Per Common Share (Basic) (in dollars per share)	$ 0.55	$ 0.67	$ 1.37	$ 1.14