Segment Information - Additional Information (Detail) - Customer	9 Months Ended
Sep. 26, 2020	Sep. 28, 2019
Segment Reporting Information [Line Items]
Number of customers accounting for 10 percent or more of total revenue	0	0
No single customer accounted for benchmark percentage to be considered major customer	10.00%	10.00%

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