Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurement - Summary of Change in Fair Value of The Warrant Liabilities (Detail)

v3.21.2
Fair Value Measurement - Summary of Change in Fair Value of The Warrant Liabilities (Detail) - Level 3 [Member] - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Beginning balance   $ 197
Issuance of warrants to Silicon Valley Bank   1,806
Ending balance   $ 2,003
Contingent Earnout Liability [Member]    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Beginning balance $ 0  
Issuance of warrants to Silicon Valley Bank  
Conversion of Silicon Valley Bank warrants to common stock  
Exercise of series C preferred warrants  
Contingent interest embedded derivative recognized relating to the FP Term Loan agreement  
Contingent interest embedded derivative derecognized upon the execution of the FP Amendment  
Contingent earnout liability recognized upon the closing of the reverse recapitalization 77,170  
Change in fair value included in other income (expense), net  
Transferred to Level 2 upon the closing of the reverse recapitalization  
Ending balance 77,170  
Contingent Interest Embedded Derivative [Member]    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Beginning balance 0  
Issuance of warrants to Silicon Valley Bank  
Conversion of Silicon Valley Bank warrants to common stock  
Exercise of series C preferred warrants  
Contingent interest embedded derivative recognized relating to the FP Term Loan agreement 8,922  
Contingent interest embedded derivative derecognized upon the execution of the FP Amendment (8,922)  
Contingent earnout liability recognized upon the closing of the reverse recapitalization  
Change in fair value included in other income (expense), net  
Transferred to Level 2 upon the closing of the reverse recapitalization  
Ending balance 0  
Warrant Liability [Member]    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Beginning balance 4,007  
Issuance of warrants to Silicon Valley Bank 308  
Conversion of Silicon Valley Bank warrants to common stock (308)  
Exercise of series C preferred warrants (891)  
Contingent interest embedded derivative recognized relating to the FP Term Loan agreement  
Contingent interest embedded derivative derecognized upon the execution of the FP Amendment  
Contingent earnout liability recognized upon the closing of the reverse recapitalization  
Change in fair value included in other income (expense), net 19,466  
Transferred to Level 2 upon the closing of the reverse recapitalization (22,582)  
Ending balance $ 0