CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 4,901,825	$ 5,247,063	$ 4,884,288
Other comprehensive loss:
Unrealized (loss) gain on securities arising during the period	(347,066)	(2,158,236)	26,255
Reclassification adjustment for securities gains realized in net income	(45,820)	(380,904)	(423,832)
Other comprehensive loss, before tax	(392,886)	(2,539,140)	(397,577)
Income tax effect related to items of other comprehensive loss	116,007	939,482	147,104
Other comprehensive loss, after tax	(276,879)	(1,599,658)	(250,473)
Total comprehensive income	$ 4,624,946	$ 3,647,405	$ 4,633,815