Summary of Significant Accounting Policies (Summary of Property, Plant and Equipment) (Details) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Total cost	$ 8,458,065	$ 8,399,946
Accumulated depreciation	(4,965,251)	(4,896,042)
Net property and equipent	3,492,814	3,503,904
Automobiles [Member]
Property, Plant and Equipment [Line Items]
Total cost	626,208	794,959
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Total cost	434,352	425,825
Computer Equipment and Software [Member]
Property, Plant and Equipment [Line Items]
Total cost	3,551,408	3,404,975
Home Office [Member]
Property, Plant and Equipment [Line Items]
Total cost	$ 3,846,097	$ 3,774,187