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Property and Equipment - Summary of Property and Equipment (Details) - USD ($) $ in Thousands | Jul. 31, 2022 | Apr. 30, 2022
--- | --- | ---
Property, Plant and Equipment [Line Items] |  |
Total property and equipment | $ 13,803 | $ 12,711
Less: Accumulated depreciation | (6,105) | (5,577)
Property and equipment, net | $ 7,698 | $ 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 | 1,953 | 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 | 9,073 | 8,618
Assets in progress |  |
Property, Plant and Equipment [Line Items] |  |
Total property and equipment | 532 | 181
Leasehold improvements |  |
Property, Plant and Equipment [Line Items] |  |
Total property and equipment | $ 111 | $ 111

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