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GEOGRAPHIC INFORMATION (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 28, 2016	Sep. 28, 2016	Jun. 29, 2016	Mar. 30, 2016	Dec. 30, 2015	Sep. 30, 2015	Jul. 01, 2015	Apr. 01, 2015	Dec. 28, 2016	Dec. 30, 2015	Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 73,271	$ 74,567	$ 66,472	$ 54,165	$ 51,061	$ 53,273	$ 48,450	$ 37,808	$ 268,475	$ 190,592	$ 118,530
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue									260,602	184,408	112,743
Other countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue									$ 7,873	$ 6,184	$ 5,787

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ 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 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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