Property, Buildings and Equipment - Additional information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Depreciation	$ 2,127,191	$ 2,443,889
Property, Plant and Equipment, Net	34,382,542	36,130,652
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	25,034,431	23,000,065
Assets Held under Capital Leases [Member]
Property, Plant and Equipment [Line Items]
Depreciation	379,790	423,333
Property, Plant and Equipment, Net	2,059,243	2,059,243
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$ 1,608,825	$ 1,229,035