Computation of Earnings Per Share (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Basic and diluted earnings per share [Abstract]
Net income	$ 641,500	$ 433,700
Weighted average shares outstanding for the period (in shares)	1,550,032	1,566,699
Basic earnings per share (in dollars per share)	$ 0.41	$ 0.28
Diluted earnings per share (in dollars per share)	$ 0.41	$ 0.28