Property, Plant and Equipment - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Property, Plant and Equipment
Property Plant And Equipment [Line Items]
Depreciation expense	$ 3,643,492	$ 3,268,899
Product
Property Plant And Equipment [Line Items]
Cost of goods sold, depreciation and amortization	$ 1,566,088	$ 1,490,995