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Marketable Debt Securities - Summary of Classification of Marketable Debt Securities in Condensed Consolidated Balance Sheets (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Investments Debt And Equity Securities [Abstract]    
Short-term marketable debt securities $ 0 $ 10,284
Long-term marketable debt securities 0 0
Marketable Securities, Total $ 0 $ 10,284