Formation and Business of the Company (Details)	3 Months Ended	12 Months Ended
Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 30, 2017	Dec. 31, 2016	Dec. 26, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of days in fiscal year	91 days	91 days	91 days	91 days	364 days	371 days	364 days

Duration of a fiscal period, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but not limited to, weeks in a year or quarter.

No definition available.

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