Investments in Securities and Fair Value Schedule of Gross Realized Gains (Losses) on Securities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Gross realized gains	$ 1,147,649	$ 1,578,053	$ 1,028,133
Gross realized losses	(408,918)	(1,610,275)	(524,396)
Net realized gain (loss)	738,731	(32,222)	503,737
Impairments of other assets and investments	0	(233,069)	(10,062)
Net gain on other assets and investments	29,705	149,128	45,288
Net loss on other assets and investments	0	0	(270,669)
Realized Investment Gains (Losses)	29,705	(83,941)	(235,443)
Gain (Loss) on Investments	768,436	(116,163)	268,294
Special revenue issuer obligations of U S states, territories and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Gross realized gains	161	0	0
Corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Gross realized gains	119,001	5,417	6,670
Common stocks and nonredeemable preferred stocks
Schedule of Available-for-sale Securities [Line Items]
Gross realized gains	953,491	1,572,636	1,021,463
Gross realized losses	(173,357)	(846,500)	(509,854)
Auction rate securities
Schedule of Available-for-sale Securities [Line Items]
Gross realized gains	74,996	0	0
General obligations of U.S. states, territories and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Gross realized losses	(535)	(12,319)	0
Special revenue issuer obligations of U S states, territories and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Gross realized losses	(1,085)	(397)	0
Other than temporary impairment of securities
Schedule of Available-for-sale Securities [Line Items]
Gross realized losses	$ (233,941)	$ (751,059)	$ (14,542)