Accounting Policies - Additional Information (Detail)	6 Months Ended
Nov. 30, 2020
Minimum
Significant Accounting Policies [Line Items]
Finite lived intangible assets, useful life	5 years
Maximum
Significant Accounting Policies [Line Items]
Finite lived intangible assets, useful life	25 years

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration