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Leases - Schedule of Disclosure in Tabular Form of Nature of Companies Leases (Detail)
 9 Months Ended
Jan. 31, 2024
Lease
LeasedAsset
Lab and office facilities  
Disclosure In Tabular Form Of Nature Of Companies Leases [Line Items]  
Number of right of use assets leased | LeasedAsset 4
No. of leases with extension options 3
No. of leases with options to purchase 0
No. of leases with variable payments linked to an index 2
No. of leases with termination options 2
Automobile  
Disclosure In Tabular Form Of Nature Of Companies Leases [Line Items]  
Number of right of use assets leased | LeasedAsset 6
No. of leases with extension options 0
No. of leases with options to purchase 0
No. of leases with variable payments linked to an index 6
No. of leases with termination options 6
Weighted average | Lab and office facilities  
Disclosure In Tabular Form Of Nature Of Companies Leases [Line Items]  
Range of remaining term 5 years
Weighted average | Automobile  
Disclosure In Tabular Form Of Nature Of Companies Leases [Line Items]  
Range of remaining term 2 years
Bottom of Range | Lab and office facilities  
Disclosure In Tabular Form Of Nature Of Companies Leases [Line Items]  
Range of remaining term 6 months
Bottom of Range | Automobile  
Disclosure In Tabular Form Of Nature Of Companies Leases [Line Items]  
Range of remaining term 1 year
Top of Range | Lab and office facilities  
Disclosure In Tabular Form Of Nature Of Companies Leases [Line Items]  
Range of remaining term 10 years 6 months
Top of Range | Automobile  
Disclosure In Tabular Form Of Nature Of Companies Leases [Line Items]  
Range of remaining term 3 years 6 months