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Basic and Diluted Net Loss Per Share - Narrative (Detail)
3 Months Ended 9 Months Ended
Sep. 30, 2021
shares
Sep. 30, 2021
shares
Earnings Per Share [Abstract]    
Weighted-average sponsor vesting shares subject to return (in shares) 4,500,000 1,615,385
Shares of common stock (in shares) 1,481,531 1,481,531
Earnout shares of common stock outstanding (in shares) 25,000,000 25,000,000
Sponsor vesting shares of common stock outstanding (in shares) 4,500,000 4,500,000