Summary of Significant Accounting Policies (Accumulated Other Comprehensive Earnings (Loss)) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cumulative-effect adjustment from ASU 2016-01		$ 1,400,000
Total other comprehensive earnings (loss)	$ 3,168,615	(3,808,045)
Accumulated Net Investment Gain (Loss) Including Portion Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(1,580,976)	2,227,069
Cumulative-effect adjustment from ASU 2016-01		1,366,297
Adjusted beginning balance	(214,679)	2,227,069
Oher comprehensive earnings (loss) before reclassifications	3,393,585	(3,049,791)
Amount reclassified from accumulated other comprehensive earnings	(224,970)	(758,254)
Total other comprehensive earnings (loss)	3,168,615	(3,808,045)
Balance	$ 2,953,936	$ (1,580,976)