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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 |

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