Post-effective amendment to a registration statement that is not immediately effective upon filing

Net Loss Per Share - Summary Of Potentially Dilutive Outstanding Securities Were Excluded From The Computation Of Diluted Net Loss Per Share (Detail)

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Net Loss Per Share - Summary Of Potentially Dilutive Outstanding Securities Were Excluded From The Computation Of Diluted Net Loss Per Share (Detail) - shares
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of earnings per share, amount 80,881,000 162,790,000
Redeemable convertible preferred stock [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of earnings per share, amount 0 135,225,000
Founders Convertible Preferred Stock [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of earnings per share, amount 0 3,993,000
Unvested common stock shares [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of earnings per share, amount 0 4,032,000
Stock options [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of earnings per share, amount 12,421,000 16,925,000
Restricted stock units [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of earnings per share, amount 24,166 0
Early Exercises of Stock Options [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of earnings per share, amount 309,000 2,521,000
Warrants to purchase redeemable convertible prime preferred stock [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of earnings per share, amount 0 94,000
Management Award Restricted Stock Units [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of earnings per share, amount 29,073 0
Warrants to purchase Class A common stock    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of earnings per share, amount 12,935,000 0
Contingently Issuable Shares [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of earnings per share, amount 1,977 0