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Segment, Geographic, Product and Significant Customer Information (Tables)

6 Months Ended

Jun. 30, 2018

Segment Reporting [Abstract]

Total net revenue

The following tables summarize total net revenues and long-lived assets (excluding intangible assets) attributed to significant countries (in thousands)

		Three Months Ended								Six Months Ended
		June 30, 2018				July 1, 2017				June 30, 2018				July 1, 2017
Total net revenues:
South Korea		$	30,980			$	31,500			$	68,798			$	50,119
Japan			15,017				9,267				28,396				12,620
United States			7,392				8,297				14,130				21,870
China			28,333				7,330				36,375				14,017
Taiwan			1,974				4,878				3,034				16,711
Singapore			2,380				963				14,535				2,454
Other			2,528				2,192				5,649				5,950
Total net revenues		$	88,604			$	64,427			$	170,917			$	123,741

Long-lived tangible assets

		June 30, 2018				December 30, 2017
Long-lived tangible assets:
United States		$	41,851			$	43,427
International			1,199				1,383
Total long-lived tangible assets		$	43,050			$	44,810

X

- Definition

Tabular disclosure of the names of foreign countries from which revenue is material and the amount of revenue from external customers attributed to those countries. An entity may also provide subtotals of geographic information about groups of countries.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e9038-108599

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- Definition

Tabular disclosure of information concerning material long-lived assets (excluding financial instruments, customer relationships with financial institutions, mortgage and other servicing rights, deferred policy acquisition costs, and deferred taxes assets) located in identified geographic areas and/or the amount of revenue from external customers attributed to that country from which revenue is material. An entity may also provide subtotals of geographic information about groups of countries.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e9038-108599

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

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Period Type:	duration

X

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	duration