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Income Taxes - Additional Information (Detail) - USD ($)
12 Months Ended
May 31, 2022
May 31, 2021
May 31, 2020
Income Taxes [Line Items]      
Effective tax rates upon inclusion of net earnings attributable to noncontrolling interests 22.40% 19.20% 23.80%
Total unrecognized tax benefits $ 4,706,000 $ 3,836,000 $ 1,621,000
Unrecognized tax benefits if recognized would affect tax rate attributable to controlling interest 3,930,000    
Interest and penalties related to unrecognized tax benefits 367,000 12,000 $ 68,000
Valuation allowance for deferred tax assets 5,878,000 $ 9,124,000  
Federal Jurisdiction      
Income Taxes [Line Items]      
Net operating loss carry forwards 1,636,000    
State and Local Jurisdiction      
Income Taxes [Line Items]      
Net operating loss carry forwards $ 5,051,000    
State and Local Jurisdiction | Latest Tax Year      
Income Taxes [Line Items]      
Operating loss carryforwards, expiration date May 31, 2042    
Non - United States      
Income Taxes [Line Items]      
Net operating loss carry forwards $ 1,491,000