Consolidated Statements of Comprehensive Income - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 4,033,977	$ 3,373,635	$ 2,903,830
Other comprehensive income (loss), net of tax:
Unrealized gain (loss) on securities available for sale	(704,188)	116,782	1,490,640
Reclassification adjustment for (gain) loss realized in income on securities available for sale	(144,034)	17,992	(293,508)
Unrealized gain (loss) on pension plan benefits	(110,306)	(1,032,035)	55,700
Federal income tax expense (benefit)	(325,900)	(305,069)	425,963
Other comprehensive income (loss), net of tax	(632,628)	(592,192)	826,869
Total comprehensive income	$ 3,401,349	$ 2,781,443	$ 3,730,699