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Fair Value - Schedule of Fair Value Liabilities, Activity for Convertible Preferred Stock Warrant Liability (Details) - Convertible Preferred Stock Warrant Liability
$ in Thousands
12 Months Ended
Dec. 31, 2020
USD ($)
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]  
Derivative liability recorded upon issuance of convertible notes $ 364
Change in fair value of liability 641
Settlement upon IPO $ (1,005)