Note 11 - Earnings Per Common Share - Summary of Earnings Per Share Calculation (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Net Income	$ 1,426,090	$ 1,694,868	$ 3,730,497	$ 5,271,805
Weighted average shares of common stock outstanding - Basic (in shares)	3,324,380	2,850,958	3,317,864	2,787,845
Earnings Per Share - Basic (in dollars per share)	$ 0.43	$ 0.59	$ 1.12	$ 1.89
Warrants, Options and Convertible Notes (in shares)	1,623	398,275	1,637	435,159
Weighted average shares of common stock -Diluted (in shares)	3,326,003	3,249,233	3,319,501	3,223,004
Earnings Per Share - Diluted (in dollars per share)	$ 0.43	$ 0.52	$ 1.12	$ 1.64