Unrecognized Tax Benefits - Narrative (Details) - USD ($) $ in Thousands	9 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Apr. 30, 2021
Income Tax Disclosure [Abstract]
Unrecognized tax benefits	$ 11,584		$ 9,316
Unrecognized tax benefits that would impact effective tax rate	9,151
Accrued interest and penalties related to unrecognized tax benefits	554		$ 370
Net interest and penalties included in income tax expense	184	$ 176
Expected decrease in unrecognized tax benefits	$ 2,000