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Balance Sheet Details - Property and Equipment, Net (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 13,109 $ 8,512
Accumulated depreciation (3,948) (5,332)
Property and equipment, net 9,161 3,180
Machinery and Equipment    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 113 113
Computers and Software    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 5,315 3,724
Leasehold Improvements    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 4,033 2,560
Furniture and Fixtures    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 3,648 $ 2,115