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Consolidated Balance Sheet Components - Schedule of Prepaid and Other Current Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Prepaid Expense And Other Assets Current [Abstract] |  |
Prepaid research and development | $ 7,895 | $ 2,534
Prepaid taxes | 836 | 481
Prepaid other | 2,506 | 2,533
Total prepaid and other current assets | $ 11,237 | $ 5,548

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