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Stockholders' Equity - Summary of Unvested Restricted Stock Unit Activity (Detail) - Restricted Stock Units [Member]
 3 Months Ended
Mar. 31, 2024
$ / shares
shares
Class of Stock [Line Items]  
Unvested as of January 1, 2024 | shares 22,422,895
Shares, Granted | shares 23,681,803
Shares, Vested | shares (6,542,751)
Shares, Forfeited | shares (1,865,789)
Unvested as of March 31, 2024 | shares 37,696,158
Weighted Average Grant Date Fair Value, Unvested as of January 1, 2024 | $ / shares $ 7.45
Weighted Average Grant Date Fair Value, Granted | $ / shares 1.28
Weighted Average Grant Date Fair Value, Vested | $ / shares 2.59
Weighted Average Grant Date Fair Value, Forfeited | $ / shares 3.84
Weighted Average Grant Date Fair Value, Unvested as of March 31, 2024 | $ / shares $ 4.6