Summary of Significant Accounting Policies - Summary of Activity of the Level 3 Liabilities Carried at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
	Dec. 01, 2020	Sep. 30, 2021	Sep. 30, 2021
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value at issuance of contingent earn-out liability	$ 9,800
Change in fair value of contingent earn-out liabilities		$ (4,245)	$ (11,949)
Level 3 | Fair Value of Contingent Earn-out Liability
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liabilities carried at fair value on a recurring basis, Beginning balance			22,531
Liabilities carried at fair value on a recurring basis, Ending balance		31,553	31,553
Level 3 | Fair Value of Warrant Liability
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liabilities carried at fair value on a recurring basis, Beginning balance			31,821
Liabilities carried at fair value on a recurring basis, Ending balance
Level 3 | Fair Value of Derivative Liability
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liabilities carried at fair value on a recurring basis, Ending balance		1,360	1,360
Fair Value, Recurring | Level 3 | Fair Value of Contingent Earn-out Liability
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liabilities carried at fair value on a recurring basis, Beginning balance			22,531
Fair value at issuance of contingent earn-out liability			20,971
Change in fair value of contingent earn-out liabilities			(11,949)
Liabilities carried at fair value on a recurring basis, Ending balance		31,553	31,553
Fair Value, Recurring | Level 3 | Fair Value of Warrant Liability
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liabilities carried at fair value on a recurring basis, Beginning balance			31,821
Modification of warrant liability to equity classification			(58,276)
Change in fair value of warrant liability			26,455
Liabilities carried at fair value on a recurring basis, Ending balance
Fair Value, Recurring | Level 3 | Fair Value of Derivative Liability
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value at issuance of derivative liability			(1,894)
Change in fair value of derivative liability			3,254
Liabilities carried at fair value on a recurring basis, Ending balance		$ 1,360	$ 1,360