Supplemental Financial Information - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Apr. 30, 2022	Apr. 30, 2021
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 31,680	$ 20,375
Less: accumulated depreciation and amortization	(9,836)	(6,144)
Property and equipment, net	21,844	14,231
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,736	1,606
Laboratory equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	9,521	6,603
Production equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	15,502	5,680
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,465	1,349
Others
Property, Plant and Equipment [Line Items]
Property and equipment, gross	524	439
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 2,932	$ 4,698

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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