Note 11 - Earnings Per Common Share - Summary of Earnings Per Share Calculation (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Net Income	$ 1,197,877	$ 1,426,090	$ 5,588,599	$ 3,730,497
Weighted average shares of common stock outstanding - Basic (in shares)	3,408,906	3,324,380	3,403,609	3,317,864
Earnings Per Share - Basic (in dollars per share)	$ 0.35	$ 0.43	$ 1.64	$ 1.12
Options (in shares)	913	1,623	898	1,637
Weighted average shares of common stock -Diluted (in shares)	3,409,819	3,326,003	3,404,507	3,319,501
Earnings Per Share - Diluted (in dollars per share)	$ 0.35	$ 0.43	$ 1.64	$ 1.12