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Fair Value Measurements - Schedule of Liability for Derivatives and Warrants (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Fair Value Disclosures [Abstract]    
Warrant liabilities, at beginning $ 22,686  
Warrant liabilities, Change in fair value 585 $ 366
Warrant liabilities, Redemptions (15,241)  
Warrant liabilities, at end $ 8,030