Property and Equipment - Summary of Property and Equipment (Details) - USD ($) $ in Thousands	Apr. 30, 2023	Apr. 30, 2022
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 15,816	$ 12,711
Less: Accumulated depreciation and amortization	(8,630)	(5,577)
Property and equipment, net	$ 7,186	$ 7,134
Finance lease, right-of-use asset, statement of financial position [Extensible Enumeration]	Property and equipment, net	Property 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	2,102	1,667
Laboratory equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	10,390	8,618
Capitalized software development costs
Property, Plant and Equipment [Line Items]
Total property and equipment	1,888	1,888
Assets in progress
Property, Plant and Equipment [Line Items]
Total property and equipment	1,079	181
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 111	$ 111