Note 11 - Earnings Per Common Share - Summary of Earnings Per Share Calculation (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Net Income	$ 1,247,305	$ 228,837	$ 4,390,722	$ 2,304,407
Weighted average shares of common stock outstanding - Basic (in shares)	3,408,906	3,317,665	3,400,917	3,314,573
Earnings Per Share - Basic (in dollars per share)	$ 0.37	$ 0.07	$ 1.29	$ 0.70
Warrants, Options and Convertible Notes (in shares)	894	1,599	888	1,644
Weighted average shares of common stock -Diluted (in shares)	3,409,800	3,319,264	3,401,805	3,316,217
Earnings Per Share - Diluted (in dollars per share)	$ 0.37	$ 0.07	$ 1.29	$ 0.69