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Commitments and Contingencies - Additional Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Feb. 28, 2025
Feb. 29, 2024
Feb. 28, 2025
May 31, 2024
Commitments and Contingencies Disclosure [Line Items]        
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration] Liabilities   Liabilities Liabilities
Estimated liability costs of remediation $ 916   $ 916 $ 916
Estimated liability, measurement period, years     15 years  
Estimated liability costs of remediation, current $ 100   $ 100  
Environmental Loss Contingency, Current, Statement of Financial Position [Extensible Enumeration] Liabilities, Current   Liabilities, Current  
Estimated liability costs of remediation, non current $ 816   $ 816  
Environmental Loss Contingency, Noncurrent, Statement of Financial Position [Extensible Enumeration] Other Liabilities, Noncurrent   Other Liabilities, Noncurrent  
Fixed asset impairment $ 2,055      
Proceeds from legal settlement 2,700      
Contingency loss 1,400      
Reversal of contingent liability $ 930      
Proceeds form business interruption insurance   $ 1,265    
Minimum        
Commitments and Contingencies Disclosure [Line Items]        
Environmental remediation expense     $ 38  
Environmental Remediation Expense, before Recovery, Statement of Income or Comprehensive Income [Extensible Enumeration]     Operating Expenses  
Maximum        
Commitments and Contingencies Disclosure [Line Items]        
Environmental remediation expense     $ 131  
Environmental Remediation Expense, before Recovery, Statement of Income or Comprehensive Income [Extensible Enumeration]     Operating Expenses