XML 63 R54.htm IDEA: XBRL DOCUMENT v3.23.1
Commitments and Contingencies - Additional Information (Detail) - USD ($)
 9 Months Ended
Feb. 28, 2023
May 31, 2022
Commitments and Contingencies Disclosure [Line Items]    
Estimated liability costs of remediation $ 916,000 $ 916,000
Estimated liability, measurement period, years 15 years  
Estimated liability costs of remediation, current $ 100,000  
Estimated liability costs of remediation, non current 816,000  
Environmental loss contingencies, charges to expense for potential fines or penalties 600,000  
Minimum    
Commitments and Contingencies Disclosure [Line Items]    
Environmental remediation expense 38,000  
Maximum    
Commitments and Contingencies Disclosure [Line Items]    
Environmental remediation expense $ 131,000