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Stockholders' Equity (Deficit) - Additional Information (Detail)
3 Months Ended 6 Months Ended
Jun. 30, 2021
$ / shares
shares
Jun. 30, 2021
vote
$ / shares
shares
Mar. 09, 2021
shares
Dec. 31, 2020
shares
Class of Stock [Line Items]        
Shares authorized (in shares)     361,744,000  
Common stock, shares authorized (in shares) 5,000,000,000 5,000,000,000   740,000,000
Common stock, conversion ratio 1 1    
Term of conversion, threshold percentage of common stock outstanding 66.67% 66.67%    
Common Class A        
Class of Stock [Line Items]        
Common stock, shares authorized (in shares) 4,935,000,000 4,935,000,000   675,000,000
Common Class A | Certificate Of Incorporation Restated        
Class of Stock [Line Items]        
Common stock, shares authorized (in shares) 4,935,000,000.0 4,935,000,000.0    
Common stock, voting rights per share | vote   1    
Common Class A | David Baszucki Founder        
Class of Stock [Line Items]        
Number of Class B common stock converted into Class A common stock (in shares) 0 3,700,000    
Common Class B        
Class of Stock [Line Items]        
Common stock, shares authorized (in shares) 65,000,000 65,000,000   65,000,000
Maximum percentage of stock outstanding of a particular class before which shares of another class are converted into this class 30.00% 30.00%    
Common Class B | Certificate Of Incorporation Restated        
Class of Stock [Line Items]        
Common stock, shares authorized (in shares) 65,000,000.0 65,000,000.0    
Common stock, voting rights per share | vote   20    
Preferred Stock        
Class of Stock [Line Items]        
Shares authorized (in shares) 100,000,000 100,000,000    
Convertible preferred stock, par value (in dollars per share) | $ / shares $ 0.0001 $ 0.0001