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Balance Sheet Components - Accrued Expenses and Other Payables (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Accrued Expenses and Other Payables    
Accrued clinical and research related expenses $ 29,407 $ 27,950
Accrued employee related expenses 4,389 7,125
Accrued professional service fees 688 734
Accrued collaboration payments 1,500 1,500
Other 260 407
Total accrued expenses and other payables $ 36,244 $ 37,716