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Redeemable Convertible Preferred Stock and Redeemable Convertible A-1 Common Stock (Details)
$ in Millions
1 Months Ended
Dec. 31, 2020
USD ($)
shares
Jul. 31, 2021
shares
Apr. 30, 2021
shares
Jul. 31, 2020
shares
Apr. 30, 2020
shares
Redeemable Convertible Preferred Stock, Excluding Series A Preferred Stock          
Temporary Equity [Line Items]          
Conversion of stock, converted (in shares) 33,628,776        
Conversion ratio 1        
Series A Preferred Stock          
Temporary Equity [Line Items]          
Conversion of stock, converted (in shares) 3,499,992        
Conversion ratio 1        
Redeemable Convertible Preferred Stock          
Temporary Equity [Line Items]          
Carrying value reclassified into stockholders' equity | $ $ 399.8        
Shares issued (in shares)   0      
Shares outstanding (in shares)   0 0 37,129,000 37,129,000
Redeemable Convertible A-1 Common Stock          
Temporary Equity [Line Items]          
Conversion of stock, converted (in shares) 6,666,665        
Conversion ratio 1        
Carrying value reclassified into stockholders' equity | $ $ 18.8        
Shares issued (in shares)   0      
Shares outstanding (in shares)   0 0 6,667,000 6,667,000