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Retirement Benefits - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2026	Apr. 30, 2025
UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Employer matching contributions	$ 1,634	$ 1,177
Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Employer matching contributions	$ 232	$ 247

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