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Segment Information (Revenues from Geographic Regions) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 29, 2017	Sep. 29, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 30, 2016	Sep. 30, 2016	Jul. 01, 2016	Apr. 01, 2016	Dec. 29, 2017	Dec. 30, 2016	Jan. 01, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 120,072	$ 152,510	$ 99,008	$ 80,887	$ 77,581	$ 62,194	$ 36,252	$ 15,427	$ 452,477	$ 191,454	$ 37,172
Geographic concentration risk [Member] | Sales revenue, net [Member] | U.S. [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									367,906	140,709	33,869
Geographic concentration risk [Member] | Sales revenue, net [Member] | Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									69,792	35,745	3,303
Geographic concentration risk [Member] | Sales revenue, net [Member] | Rest of the world [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									$ 14,779	$ 15,000	$ 0

X

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ 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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