Quarterly report pursuant to Section 13 or 15(d)

Balance Sheet Components - Property and Equipment (Details)

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Balance Sheet Components - Property and Equipment (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Property Plant And Equipment [Line Items]    
Total property and equipment $ 6,192 $ 6,099
Less accumulated depreciation and amortization (2,061) (1,817)
Property and equipment, net 4,131 4,282
Leasehold Improvements    
Property Plant And Equipment [Line Items]    
Total property and equipment 3,268 3,268
Furniture, Laboratory and Office Equipment    
Property Plant And Equipment [Line Items]    
Total property and equipment 2,666 2,578
Computer Equipment    
Property Plant And Equipment [Line Items]    
Total property and equipment $ 258 $ 253