Summary of Significant Accounting Policies (Summary of Property, Plant and Equipment) (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Total cost	$ 9,014,901	$ 8,940,059
Accumulated depreciation	(6,196,657)	(6,079,728)
Net property and equipment	2,818,244	2,860,331
Automobiles [Member]
Property, Plant and Equipment [Line Items]
Total cost	530,723	530,722
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Total cost	488,642	491,766
Computer Equipment and Software [Member]
Property, Plant and Equipment [Line Items]
Total cost	4,046,770	3,971,272
Home Office [Member]
Property, Plant and Equipment [Line Items]
Total cost	$ 3,948,766	$ 3,946,299