Consolidated Statements Of Cash Flows (Parenthetical) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Cash Flows [Abstract]
Non cash net unrealized loss (gain) on investments, deferred tax benefit (provision)	$ (133,892)	$ 708,564	$ (805,799)
Adjustments to postretirement benefits obligation, net of deferred tax benefit (provision)	$ 192	$ 21,612	$ 16,021