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Amount of unrecognized tax benefits.

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Income Taxes - Additional Information (Detail)	12 Months Ended
Income Taxes - Additional Information (Detail)	May 31, 2026 EUR (€)	May 31, 2026 USD ($)	May 31, 2025 USD ($)	May 31, 2024 USD ($)
Income Taxes [Line Items]
Effective tax rates upon inclusion of net earnings attributable to noncontrolling interests	23.00%
Total unrecognized tax benefits		$ 0	$ 1,826,000	$ 3,467,000
Interest and penalties related to unrecognized tax benefits		0	564,000	$ 881,000
Income tax receivable related to anticipated refund and interest			16,741,000
Valuation allowance for deferred tax assets		10,118,000	$ 10,477,000
Global minimum tax rate	15.00%
Minimum global revenues \| €	€ 750,000,000
Federal Jurisdiction
Income Taxes [Line Items]
NOL carry forwards		1,636,000
State and Local Jurisdiction
Income Taxes [Line Items]
NOL carry forwards		$ 3,418,000