Subsequent Events - Additional Information (Detail) - Subsequent Event $ in Thousands	Oct. 25, 2018 USD ($)
CEO
Subsequent Event [Line Items]
Base pay	$ 750
Millen, Georgia Facility
Subsequent Event [Line Items]
Consideration receivable on sale of plant	$ 26,000

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

No definition available.

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