Property and Equipment - Summary of Property and Equipment (Details) - USD ($) $ in Thousands	Apr. 30, 2024	Apr. 30, 2023
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 16,112	$ 15,816
Less: Accumulated depreciation and amortization	(10,391)	(8,630)
Property and equipment, net	$ 5,721	$ 7,186
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	2,152	2,102
Laboratory equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	11,506	10,390
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	3	1,079
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 317	$ 111