Property and Equipment (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 19,413,087	$ 16,937,620
Less accumulated depreciation	(9,240,183)	(8,184,154)
Property and equipment, net	$ 10,172,904	8,753,466
Minimum
Property, Plant and Equipment [Line Items]
Property and equipment useful life	3 years
Maximum
Property, Plant and Equipment [Line Items]
Property and equipment useful life	25 years
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,122,582	1,122,582
Office buildings and improvements (25 years)
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 4,406,117	4,399,448
Property and equipment useful life	25 years
Office buildings and improvements (25 years) | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment useful life	3 years
Office buildings and improvements (25 years) | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment useful life	25 years
Furniture, fixtures and equipment (3 to 10 years)
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 12,993,387	10,444,355
Furniture, fixtures and equipment (3 to 10 years) | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment useful life	3 years
Furniture, fixtures and equipment (3 to 10 years) | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment useful life	10 years
Automobiles (3 years)
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 891,001	$ 971,235
Property and equipment useful life	3 years