Property, Buildings and Equipment, Net - Schedule of Property, Buildings and Equipment (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property, buildings and equipment	$ 62,597,679	$ 62,009,223
Accumulated depreciation	(46,031,663)	(44,477,547)
Property, buildings and equipment, net	16,566,016	17,531,676
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, buildings and equipment	8,830,867	8,740,994
Buildings and Recreational Facilities [Member]
Property, Plant and Equipment [Line Items]
Property, buildings and equipment	$ 32,055,525	31,962,963
Buildings and Recreational Facilities [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Lives	10 years
Buildings and Recreational Facilities [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Lives	40 years
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, buildings and equipment	$ 21,592,565	21,178,583
Machinery and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Lives	5 years
Machinery and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Lives	15 years
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, buildings and equipment	$ 118,722	$ 126,683