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Fair Value of Financial Instruments - Summary of Change in the Estimated Fair Value of Private Placement Warrants (Details) - Warrants
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]  
Balance at beginning of year $ 35,100
Change in value of warrants 1,352
Settlement of warrants (36,452)
Balance at end of year $ 0