Significant Accounting Policies - Schedule of Estimated Useful Lives by Asset Category (Details)	12 Months Ended
	Apr. 30, 2022
Computer equipment and software
Property, Plant and Equipment [Line Items]
Useful life	3 years
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Useful life	3 years
Laboratory equipment
Property, Plant and Equipment [Line Items]
Useful life	5 years
Production equipment
Property, Plant and Equipment [Line Items]
Useful life	5 years
Transportation equipment
Property, Plant and Equipment [Line Items]
Useful life	4 years