CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2022	Jan. 31, 2021
Statement of Comprehensive Income [Abstract]
Net loss	$ (39,447)	$ (16,852)	$ (133,645)	$ (31,646)
Other comprehensive loss
Unrealized loss on available-for-sale marketable securities, net of tax	(556)	(49)	(877)	(411)
Total comprehensive loss	$ (40,003)	$ (16,901)	$ (134,522)	$ (32,057)