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Balance Sheet Components - Accrued and Other Liabilities (Detail) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Payables And Accruals [Abstract]    
Manufacturing related $ 7,280 $ 5,465
Compensation and employee benefits 14,217 10,794
Current portion of lease liability 3,004  
Others 8,741 6,051
Total accrued and other liabilities $ 33,242 $ 22,310