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Balance Sheet Components - Summary of Other Noncurrent Liabilities (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
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Organization Consolidation And Presentation Of Financial Statements [Abstract] |  |
Redeemable preferred stock warrants liabilities | $ 0 | $ 2,112
Long term interest payable | 750 | 465
Noncurrent portion of lease liabilities | 1,178 | 134
Other noncurrent liabilities | 345 | 344
Total other noncurrent liabilities | $ 2,273 | $ 3,055

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