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Property and Equipment - Summary of Property and Equipment (Details) - USD ($) $ in Thousands | Oct. 31, 2023 | Apr. 30, 2023
--- | --- | ---
Property, Plant and Equipment [Line Items] |  |
Total property and equipment | $ 16,438 | $ 15,816
Less: Accumulated depreciation and amortization | (9,497) | (8,630)
Property and equipment, net | $ 6,941 | $ 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 | 2,164 | 2,102
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 | 11,762 | 10,390
Assets in progress |  |
Property, Plant and Equipment [Line Items] |  |
Total property and equipment | 62 | 1,079
Leasehold improvements |  |
Property, Plant and Equipment [Line Items] |  |
Total property and equipment | $ 316 | $ 111

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