Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Abstract]
Net income (loss)	$ 411,247	$ (356,424)
Weighted average common shares outstanding:
Average number of common shares outstanding - basic	9,292,488	9,262,811
Net effect of dilutive unvested restricted stock awards included for treasury stock method	16,799
Average number of common shares outstanding - diluted	9,309,287	9,262,811
Earnings per common share
Basic	$ 0.04	$ (0.04)
Diluted	$ 0.04	$ (0.04)