Investments, Net Investment Gains (Losses) and Change in Net Unrealized Gains on Available-for-sale Investments (Details) - USD ($)		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Realized gains on available-for-sale investments [Abstract]
Total realized gains		$ 534,242	$ 0
Realized losses on available-for-sale investments [Abstract]
Other-than-temporary impairments		0	(484,347)
Total realized losses		0	(498,691)
Net realized investment gains (losses)		534,242	(498,691)
Change in fair value of equity securities [Abstract]
Change in fair value of equity securities sold during the period	[1]	0	0
Change in fair value of equity securities held at the end of the period	[1]	4,129,236	0
Change in fair value of equity securities	[1]	4,129,236	0
Net investment gains (losses)	[1]	4,663,478	(498,691)
Unrealized gains on available-for-sale investments included other comprehensive income [Abstract]
Change in net unrealized gains on available-for-sale investments included in other comprehensive income		(4,285,303)	4,456,679
Fixed Maturities [Member]
Realized gains on available-for-sale investments [Abstract]
Total realized gains		0	0
Realized losses on available-for-sale investments [Abstract]
Total realized losses		0	(14,344)
Unrealized gains on available-for-sale investments included other comprehensive income [Abstract]
Change in net unrealized gains on available-for-sale investments included in other comprehensive income		(4,285,303)	3,033,099
Equity Securities [Member]
Realized gains on available-for-sale investments [Abstract]
Total realized gains	[1]	0	0
Realized losses on available-for-sale investments [Abstract]
Total realized losses	[1]	0	0
Unrealized gains on available-for-sale investments included other comprehensive income [Abstract]
Change in net unrealized gains on available-for-sale investments included in other comprehensive income	[1]	0	1,423,580
Other [Member]
Realized gains on available-for-sale investments [Abstract]
Total realized gains		534,242	0
Realized losses on available-for-sale investments [Abstract]
Total realized losses		$ 0	$ 0

[1] Effective January 1, 2018, the Company adopted ASU No. 2016-01. As a result, equity securities are no longer classified as available-for-sale with unrealized gains and losses recognized in other comprehensive income; rather, all changes in the fair value of equity securities are now recognized in net income. Prior periods have not been restated to conform to the current presentation. See note 2.