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Redeemable Convertible Preferred Stock and Redeemable Convertible A-1 Common Stock (Details)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Dec. 31, 2020
USD ($)
shares
Jan. 31, 2021
USD ($)
shares
Jan. 31, 2021
USD ($)
shares
Jan. 31, 2022
shares
Oct. 31, 2021
shares
Apr. 30, 2021
shares
Oct. 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 | $ $ 399,800 $ 399,753 $ 399,753          
Shares issued (in shares)       0        
Shares outstanding (in shares)   0 0 0 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 | $ $ 18,800 $ 18,800 $ 18,800          
Shares issued (in shares)       0        
Shares outstanding (in shares)   0 0 0 0 0 6,667,000 6,667,000