Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2022	Jan. 31, 2021	Apr. 30, 2021
Income Tax Disclosure [Abstract]
Income tax expense (benefit)	$ 399	$ (813)	$ 845	$ (989)
Effective income tax rate	(45.00%)	113.20%	(17.50%)	59.30%
Deferred tax liability, global tax exposure for unremitted earnings of international subsidiaries	$ 895		$ 895		$ 776