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Share Incentive Plan - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 12 Months Ended
Dec. 31, 2021
Feb. 28, 2015
Apr. 30, 2022
Apr. 30, 2021
Apr. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Total intrinsic value of options exercised during period     $ 28,400 $ 4,700 $ 1,400
Weighted average grant date fair value of options vested (in US dollars per share)     $ 1.36 $ 0.65 $ 0.39
Total grant date fair value of options vested     $ 4,500 $ 2,100 $ 1,200
Unrecognized compensation expense, options     $ 9,800    
2015 Stock Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Ordinary shares reserved for issuance (in shares)       26,000,000  
Option term   10 years      
Awards vesting term     4 years    
2015 Stock Plan | Tranche One, First Anniversary of Issuance Date          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting percentage     25.00%    
2015 Stock Plan | Tranche Two, Per Month Thereafter          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting percentage     2.083%    
2021 Long-Term Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Ordinary shares reserved for issuance (in shares) 19,907,421   15,701,171    
Awards vesting term 4 years        
Options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Compensation expense, amortization period     2 years 2 months 1 day    
Weighted average grant date fair value of options granted (in US dollars per share)     $ 6.26 $ 1.86 $ 0.99
Options | 2021 Long-Term Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Option term 10 years        
RSUs          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Grants in period (in shares)     4,176,250    
Grant date fair value of warrant (in US dollars per share)     $ 10.25    
Aggregate intrinsic value of RSUs expected to vest     $ 45,637    
Unrecognized compensation expense     $ 38,400    
Compensation expense, amortization period     3 years 5 months 4 days    
ESPP          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Ordinary shares reserved for issuance (in shares)     3,800,508    
Contribution rate not to exceed     15.00%    
Look-back period     24 months    
Percent of fair market value on purchase date     85.00%    
Offering period     2 years    
Purchase period (in months)     6 months    
Shares issued during period (in shares)     0