Land, Property and Equipment, Net (Detail) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Land, property and equipment, Gross	$ 25,677,351	$ 18,578,095
Less accumulated depreciation and amortization	(11,863,045)	(8,204,762)
Land, property and equipment, net	13,814,306	10,373,333
Land [Member]
Property, Plant and Equipment [Line Items]
Land, property and equipment, Gross	3,300,000	3,300,000
Building [Member]
Property, Plant and Equipment [Line Items]
Land, property and equipment, Gross	2,308,247	2,510,161
Computer Software [Member]
Property, Plant and Equipment [Line Items]
Land, property and equipment, Gross	2,471,015	2,263,805
Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Land, property and equipment, Gross	11,557,683	7,928,054
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Land, property and equipment, Gross	744,706	954,470
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Land, property and equipment, Gross	$ 5,295,700	$ 1,621,605