Quarterly report pursuant to Section 13 or 15(d)

Net Profit (Loss) per Share - Summary of Dilutive Securities are Excluded from the Denominator (Detail)

v3.21.2
Net Profit (Loss) per Share - Summary of Dilutive Securities are Excluded from the Denominator (Detail) - shares
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 27,036,404 115,373,537 27,036,404 115,373,537
Convertible preferred stock        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount   107,522,670   107,522,670
Unvested RSUs        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 3,844,737   3,844,737  
Unvested awards        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount   7,669,939   7,669,939
Warrants        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 8,525,000 180,928 8,525,000 180,928
contingently issuable earnout shares        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 14,666,667   14,666,667