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Financial Statement Details - Other Assets (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Financial Statement Details [Abstract]    
VAT receivable $ 864 $ 697
Security deposits 634 240
Prepaid software license fees 455 0
Restricted cash 179 179
Prepaid preclinical and clinical trial services - with related party (Note 9) 92 4,075
Due from related party 51 19
Others 323 308
Other Assets $ 2,598 $ 5,518