Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (22,176)	$ (27,511)	$ 1,329
Other comprehensive income (loss):
Foreign currency translation gain (loss)	(204)	378	19
Total comprehensive income (loss)	$ (22,380)	$ (27,133)	$ 1,348