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Fair Value - Schedule of Fair Value Liabilities, Activity for Derivative Liability (Details) - Derivative Liability
$ in Thousands
12 Months Ended
Dec. 31, 2020
USD ($)
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]  
Fair value at beginning of period $ 999
Derivative liability recorded upon issuance of convertible notes 774
Change in fair value of liability 132
Derivative liability settled upon conversion of convertible notes $ (1,905)