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Property and Equipment - Summary of Property and Equipment (Details) - USD ($)
$ in Thousands
Oct. 31, 2022
Apr. 30, 2022
Property, Plant and Equipment [Line Items]    
Total property and equipment $ 14,373 $ 12,711
Less: Accumulated depreciation and amortization (6,665) (5,577)
Property and equipment, net $ 7,708 $ 7,134
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Property, Plant and Equipment, Net Property, Plant and Equipment, Net
Furniture and fixtures    
Property, Plant and Equipment [Line Items]    
Total property and equipment $ 246 $ 246
Computer equipment and software    
Property, Plant and Equipment [Line Items]    
Total property and equipment 1,967 1,667
Capitalized software development costs    
Property, Plant and Equipment [Line Items]    
Total property and equipment 1,888 1,888
Laboratory equipment    
Property, Plant and Equipment [Line Items]    
Total property and equipment 9,654 8,618
Assets in progress    
Property, Plant and Equipment [Line Items]    
Total property and equipment 507 181
Leasehold improvements    
Property, Plant and Equipment [Line Items]    
Total property and equipment $ 111 $ 111