Condensed Consolidated Statements of Retained Earnings (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Condensed Consolidated Statements of Retained Earnings
Retained earnings at beginning of period	$ 31,196,823	$ 30,228,793
Net income	707,788	510,922
Cash dividends paid, $.51 per share in 2018 and $.55 in 2017	(492,727)	(531,373)
Retained earnings at end of period	$ 31,411,884	$ 30,208,342