Property, Plant and Equipment, Net - Property, Plant and Equipment, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 70,829	$ 68,630
Less: Accumulated depreciation	(16,569)	(10,483)
Property, plant and equipment, net	54,260	58,147
Manufacturing equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment	21,705	18,073
Laboratory equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment	7,948	7,525
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment	1,681	1,648
Software, computer and other equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment	7,836	7,772
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment	30,178	29,720
Construction-in-progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 1,481	$ 3,892