Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	May 31, 2023	May 31, 2022	May 31, 2021
Income Taxes [Line Items]
Effective tax rates upon inclusion of net earnings attributable to noncontrolling interests	22.10%	22.40%	19.20%
Total unrecognized tax benefits	$ 4,663,000	$ 4,706,000	$ 3,836,000
Unrecognized tax benefits if recognized would affect tax rate attributable to controlling interest	3,896,000
Interest and penalties related to unrecognized tax benefits	621,000	367,000	$ 12,000
Liability for unrecognized tax benefit expected to be settled in the next 12 months	9,000
Valuation allowance for deferred tax assets	5,480,000	$ 5,878,000
Federal Jurisdiction
Income Taxes [Line Items]
Net operating loss carry forwards	1,636
State and Local Jurisdiction
Income Taxes [Line Items]
Net operating loss carry forwards	4,640,000
Non - United States
Income Taxes [Line Items]
Net operating loss carry forwards	$ 4,424,000