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Balance Sheet Components - Accrued Expenses and Other Payables (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Accrued Expenses and Other Payables |  |
Accrued clinical and research related expenses | $ 27,514 | $ 27,950
Accrued employee related expenses | 2,643 | 7,125
Accrued professional service fees | 1,063 | 734
Accrued collaboration payments | 1,500 | 1,500
Other | 154 | 407
Total accrued expenses and other payables | $ 32,874 | $ 37,716

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