Summary of Significant Accounting Policies - Summary of Financial Assets Measured at Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Level 1 | Cash and Cash Equivalents
Assets:
Assets	$ 61,934	$ 26,718
Level 1 | Restricted Cash
Assets:
Assets	2,129	3,379
Level 3 | Fair Market Value of Warrant Liability
Liabilities:
Liabilities		31,821
Level 3 | Estimated Fair Value of Contingent Earn-out Considerations
Liabilities:
Liabilities	35,798	$ 22,531
Level 3 | Change in Fair Market Value of Warrant Liability
Liabilities:
Liabilities	34,589
Level 3 | Change in Fair Value of Derivative Liability
Liabilities:
Liabilities	$ 1,894