Revenue - Changes in Deferred Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Change In Contract With Customer, Liability [Roll Forward]
Beginning Balance	$ 75,227	$ 60,295
Performance obligations satisfied during the period that were included in the deferred revenue balance at the beginning of the year	(71,566)	(57,542)
Increases due to invoicing prior to satisfaction of performance obligations	45,481	72,474
Ending Balance	$ 49,142	$ 75,227