Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($)	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Earnings Per Share [Abstract]
Net income	$ 249,233	$ 136,845	$ 187,823	$ 89,368	$ 395,475	$ 59,126	$ 573,901	$ 543,969
Weighted average common shares outstanding:
Average number of common shares outstanding - basic	7,646,875			7,623,182			7,639,588	7,620,747
Net effect of dilutive unvested restricted stock awards included for treasury stock method	5,382			3,104			1,286	1,022
Average number of common shares outstanding - diluted	7,652,257			7,626,286			7,640,874	7,621,769
Earnings per common share
Basic	$ 0.03			$ 0.01			$ 0.08	$ 0.07
Diluted	$ 0.03			$ 0.01			$ 0.08	$ 0.07