Fair Value Measurements - Summary of Financial Assets Measured at Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Level 1 | Cash and Cash Equivalents
Assets:
Assets	$ 34,995	$ 26,718
Level 1 | Restricted Cash
Assets:
Assets	9,773	3,379
Fair Market Value of Warrant Liability | Level 3
Liabilities:
Liabilities	75,634	31,821
Estimated Fair Value of Contingent Earn-out Considerations | Level 3
Liabilities:
Liabilities	$ 54,734	$ 22,531