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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Property and Equipment (Details) - USD ($)	12 Months Ended
	Dec. 28, 2016	Dec. 30, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Impairment charges	$ 0	$ 0	$ 0
Equipment | Minimum
Property, Plant and Equipment [Line Items]
Useful life of asset	3 years
Equipment | Maximum
Property, Plant and Equipment [Line Items]
Useful life of asset	7 years
Furniture and fixtures | Minimum
Property, Plant and Equipment [Line Items]
Useful life of asset	3 years
Furniture and fixtures | Maximum
Property, Plant and Equipment [Line Items]
Useful life of asset	7 years
Computer equipment and software | Minimum
Property, Plant and Equipment [Line Items]
Useful life of asset	3 years
Computer equipment and software | Maximum
Property, Plant and Equipment [Line Items]
Useful life of asset	7 years
Leasehold improvements | Minimum
Property, Plant and Equipment [Line Items]
Useful life of asset	10 years
Leasehold improvements | Maximum
Property, Plant and Equipment [Line Items]
Useful life of asset	20 years

X

- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2420-110228

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

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X

- 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.

+ Details

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X

- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

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