Note 10 - Earnings Per Common Share - Summary of Earnings Per Share Calculation (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net Income	$ 2,075,570	$ 1,745,458
Weighted average shares of common stock outstanding - Basic (in shares)	3,311,477	2,755,265
Earnings Per Share - Basic (in dollars per share)	$ 0.63	$ 0.63
Warrants, Options and Convertible Notes (in shares)	1,680	423,155
Weighted average shares of common stock -Diluted (in shares)	3,313,157	3,178,420
Earnings Per Share - Diluted (in dollars per share)	$ 0.63	$ 0.55