Inventory - Additional Information (Detail) - USD ($)	3 Months Ended
Nov. 30, 2022	Aug. 31, 2022
Steel Processing
Inventory [Line Items]
Lower of cost or net realizable value adjustment	$ 0	$ 4,488,000

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_InventoryLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration