Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275

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- Definition

The amount of amortization of deferred charges applied against earnings during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.3)
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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- Definition

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.

+ References

No definition available.

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Intangible Assets - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Jan. 03, 2016	Dec. 28, 2014	Dec. 29, 2013
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 1.3	$ 1.3	$ 1.3
Leasehold interests [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted-average amortization period of intangible assets	11 years 7 months 6 days
Trade name [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted-average amortization period of intangible assets	6 years 4 months 24 days