Note 3 - Net Income Per Share Computations - Reconciliation of Net Common Share Computation (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Net income	$ 998,154	$ 2,770,508
Basic (in shares)	4,966,825	4,893,324
Plus dilutive effect of deferred stock awards (in shares)	25,131	29,808
Weighted average diluted shares (in shares)	4,991,956	4,923,132
Basic earnings per share (in dollars per share)	$ 0.2	$ 0.57
Diluted earnings per share (in dollars per share)	$ 0.2	$ 0.56