v3.26.1
Income Taxes - Additional Information (Detail) - USD ($)
 12 Months Ended
May 31, 2026
May 31, 2025
May 31, 2024
Income Tax [Line Items]      
Net operating loss carryforwards $ 205,200,000    
Capital loss carryforwards 26,200,000    
Total Valuation Allowances 77,342,000 $ 49,167,000  
Increase to deferred income tax assets for U.S. foreign tax credit carryforwards 43,900,000 43,922,000  
Unrecognized tax benefits that would impact effective tax rate, if recognized 1,500,000 1,600,000 $ 4,400,000
Accrued interest and penalties related to unrecognized tax benefits 700,000 $ 600,000 $ 3,000,000
Unremitted foreign earnings 171,600,000    
Deferred income tax liability 435,000    
Provision for deferred income taxes 0    
Foreign      
Income Tax [Line Items]      
Tax credit carryforwards $ 31,200,000    
Tax credit carryforwards expiration year 2036    
U.S. | Capital Loss Carryforwards      
Income Tax [Line Items]      
Capital loss carryforwards $ 25,900,000    
Capital loss carryforwards expiration year 2031    
Interest Deduction Carryforwards      
Income Tax [Line Items]      
Net operating loss carryforwards $ 85,700,000    
Capital loss carryforwards 62,800,000    
Foreign Net Operating Loss Carryforwards      
Income Tax [Line Items]      
Net operating loss carryforwards $ 119,500,000    
Net operating loss carryforwards beginning expiration year 2027    
Net operating loss carryforwards subject to expiration $ 14,600,000    
Net operating loss carryforwards indefinite carry forward period $ 190,600,000