Summary of Significant Accounting Policies (Summary of Property, Plant and Equipment) (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Total cost	$ 8,208,040	$ 8,399,946
Accumulated depreciation	(4,691,231)	(4,896,042)
Net property and equipent	3,516,809	3,503,904
Automobiles [Member]
Property, Plant and Equipment [Line Items]
Total cost	550,736	794,959
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Total cost	426,852	425,825
Computer Equipment and Software [Member]
Property, Plant and Equipment [Line Items]
Total cost	3,446,480	3,404,975
Home Office [Member]
Property, Plant and Equipment [Line Items]
Total cost	$ 3,783,972	$ 3,774,187