Intangible Assets, Net (Details) (USD $) In Thousands, unless otherwise specified	Jan. 02, 2015	Jan. 03, 2014
Amortized intangible assets:
Amortizable intangible assets, Gross Carrying Amount	$ 11,334	$ 13,074
Amortizable intangible assets, Accumulated Amortization	(10,464)	(11,694)
Amortizable intangible assets, Net	870	1,380
Patents and Licenses [Member]
Amortized intangible assets:
Amortizable intangible assets, Gross Carrying Amount	9,205	10,637
Amortizable intangible assets, Accumulated Amortization	(8,859)	(10,057)
Amortizable intangible assets, Net	346	580
Customer relationships [Member]
Amortized intangible assets:
Amortizable intangible assets, Gross Carrying Amount	1,302	1,490
Amortizable intangible assets, Accumulated Amortization	(911)	(894)
Amortizable intangible assets, Net	391	596
Developed technology [Member]
Amortized intangible assets:
Amortizable intangible assets, Gross Carrying Amount	827	947
Amortizable intangible assets, Accumulated Amortization	(694)	(743)
Amortizable intangible assets, Net	$ 133	$ 204

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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-Publisher FASB

-Name Accounting Standards Codification

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-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274

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