Note 11 - Earnings Per Common Share - Summary of Earnings Per Share Calculation (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Net Income	$ 3,143,417	$ 2,075,570
Weighted average shares of common stock outstanding - Basic (in shares)	3,392,839	3,311,477
Earnings Per Share - Basic (in dollars per share)	$ 0.93	$ 0.63
Warrants, Options and Convertible Notes (in shares)	881	1,680
Weighted average shares of common stock -Diluted (in shares)	3,393,720	3,313,157
Earnings Per Share - Diluted (in dollars per share)	$ 0.93	$ 0.63