Commitments and Contingencies - Additional Information (Detail) - USD ($)	6 Months Ended
	Nov. 30, 2022	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