Income Taxes - Schedule of Components of Income Tax Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2020
Current
Federal	$ 224	$ 274	$ 102
State	(25)	28	1
International	1,292	544	947
Total current tax expense	1,491	846	1,050
Deferred
Federal	(1,163)	1,219	(535)
State	(142)	6	159
International	(223)	144	92
Total deferred tax benefit	(1,528)	1,369	(284)
Total tax expense	$ (37)	$ 2,215	$ 766