Property, Buildings and Equipment - Schedule of Property, Buildings and Equipment (Detail) - USD ($)	Jun. 30, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property, buildings and equipment	$ 61,203,978	$ 60,591,718
Less accumulated depreciation	(41,505,039)	(40,572,557)
Property, buildings and equipment, net	19,698,939	20,019,161
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, buildings and equipment	8,417,431	8,417,431
Buildings and Recreational Facilities [Member]
Property, Plant and Equipment [Line Items]
Property, buildings and equipment	31,323,131	31,230,183
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, buildings and equipment	20,652,025	20,017,312
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, buildings and equipment	$ 811,391	$ 926,792