CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2021
Statement of Comprehensive Income [Abstract]
Net loss	$ (268,839)	$ (192,065)	$ (55,696)
Other comprehensive income (loss)
Unrealized gain (loss) on investment securities, net of tax	1,763	(2,229)	(343)
Total comprehensive loss	$ (267,076)	$ (194,294)	$ (56,039)