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Balance Sheet Components - Summary of Accrued and Other Current Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Organization Consolidation And Presentation Of Financial Statements [Abstract] |  |
Accrued expenses | $ 2,726 | $ 1,971
Current portion of lease liabilities | $ 510 | $ 395
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] | Liabilities Current | Liabilities Current
Short term interest payable | $ 275 | $ 274
Other accrued liabilities | 655 | 446
Total accrued and other current liabilities | $ 4,166 | $ 3,086

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