Quarterly report pursuant to Section 13 or 15(d)

Balance Sheet Components - Components of Accrued Liabilities (Detail)

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Balance Sheet Components - Components of Accrued Liabilities (Detail) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Accrued Liabilities Current [Abstract]    
General and administrative $ 2,034 $ 4,521
Clinical trial related costs 1,696 1,383
Non-clinical research and manufacturing operations 6,119 5,774
Payroll related 1,659 2,849
Other accrued expenses 23 17
Total Accrued liabilities $ 11,531 $ 14,544