Income Taxes - Components of Net Loss, Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2020
Income Tax Disclosure [Abstract]
Domestic	$ (189,891)	$ (58,407)	$ (69,887)
Foreign	(1,385)	3,415	889
Net loss before provision for income taxes	$ (191,276)	$ (54,992)	$ (68,998)