Quarterly report pursuant to Section 13 or 15(d)

Property and Equipment - Schedule of Property and Equipment (Detail)

v3.19.3
Property and Equipment - Schedule of Property and Equipment (Detail) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Property Plant And Equipment [Line Items]    
Property and equipment, gross $ 65,584 $ 73,653
Accumulated depreciation and amortization (9,887) (5,077)
Property and equipment, net 55,697 68,576
Leasehold Improvements    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 49,028 47,609
Build-to-Suit Asset    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 0 10,686
Construction in Progress    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 1,868 4,682
Computer Equipment and Software    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 3,323 3,049
Lab Equipment    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 5,801 3,019
Machinery and Equipment    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 3,890 2,980
Furniture and Fixtures    
Property Plant And Equipment [Line Items]    
Property and equipment, gross $ 1,674 $ 1,628