Property, Plant and Equipment, Net - Schedule of Property, Plant and Equipment, Net (Detail) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 24,491,345	$ 14,867,960
Less: Accumulated depreciation	(2,477,108)	(612,231)
Property, plant and equipment, net	22,014,237	14,255,729
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	11,538,377	10,873,895
Capitalized Leasehold Interest [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	7,150,611
Manufacturing Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	3,779,950	2,477,637
Laboratory Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,485,544	993,409
Computer and Office Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	334,525	276,100
Asset Retirement Obligation [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	113,678	153,133
Furniture & Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 88,660	$ 93,786