New Accounting Pronouncements - Additional Information (Detail) - USD ($)	Jun. 01, 2019	May 31, 2018
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cumulative adjustment to retained earnings in the period of adoption		$ (2,833,000)
Retained Earnings
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cumulative adjustment to retained earnings in the period of adoption		$ (2,833,000)
ASC 842 | Retained Earnings
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cumulative adjustment to retained earnings in the period of adoption	$ 0