Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Summary of Fair Value Hierarchy of The Valuation (Detail)

v3.21.2
Summary of Significant Accounting Policies - Summary of Fair Value Hierarchy of The Valuation (Detail) - Fair Value, Recurring [Member] - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Contingent earnout liability $ 80,419  
SVB [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Warrant liability   $ 545
Fair Value Measurements Level 3 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Contingent earnout liability 80,419  
Fair Value Measurements Level 3 [Member] | SVB [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Warrant liability   545
Private Placement [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Warrant liability 4,284  
Private Placement [Member] | Fair Value Measurements Level 3 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Warrant liability 4,284  
Money Market Funds [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and Cash Equivalents, Fair Value 297,080 56,907
Money Market Funds [Member] | Fair Value Measurements Level 1 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and Cash Equivalents, Fair Value $ 297,080 $ 56,907