Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.1
Property and Equipment - Schedule of Property and Equipment (Detail) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Property Plant And Equipment [Line Items]    
Property and equipment, gross $ 64,676 $ 73,653
Less accumulated depreciation and amortization (6,557) (5,077)
Property and equipment, net 58,119 68,576
Leasehold Improvements    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 48,888 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 4,259 4,682
Computer Equipment and Software    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 3,211 3,049
Lab Equipment    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 3,345 3,019
Machinery and Equipment    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 3,131 2,980
Furniture and Fixtures    
Property Plant And Equipment [Line Items]    
Property and equipment, gross $ 1,842 $ 1,628