Segments - Schedule of Long Lived Assets, Excluding Financial Instruments and Tax Assets, Classified by Controlling Countries over Ten Percent (Detail) - USD ($) $ in Thousands	Apr. 30, 2025	Apr. 30, 2024	Apr. 30, 2023
Segment Reporting Information [Line Items]
Total long-lived assets	$ 326,322	$ 322,313	$ 304,566
U.S.
Segment Reporting Information [Line Items]
Total long-lived assets	177,921	175,691	186,220
United Kingdom
Segment Reporting Information [Line Items]
Total long-lived assets	71,632	64,280	22,893
Other countries
Segment Reporting Information [Line Items]
Total long-lived assets	$ 76,769	$ 82,342	$ 95,453