Other Financial Statement Information - Schedule Of Property Plant And Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 103,342	$ 67,876
Less: accumulated depreciation and amortization	(30,502)	(19,055)
Property and equipment, net	72,840	48,821
Laboratory equipment and machinery
Property, Plant and Equipment [Line Items]
Total property and equipment	30,010	22,400
Computer equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	5,783	4,991
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total property and equipment	5,887	4,143
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	42,068	33,936
Construction in progress
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 19,594	$ 2,406