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Intangible Assets, Net (Details) - USD ($) $ in Thousands	Jan. 01, 2016	Jan. 02, 2015
Intangible assets:
Long-lived intangible assets, Gross Carrying Amount	$ 11,341	$ 11,334
Long-lived intangible assets, Accumulated Amortization	(10,675)	(10,464)
Long-lived intangible assets, Net	666	870
Patents and Licenses [Member]
Intangible assets:
Long-lived intangible assets, Gross Carrying Amount	9,207	9,205
Long-lived intangible assets, Accumulated Amortization	(8,891)	(8,859)
Long-lived intangible assets, Net	316	346
Customer relationships [Member]
Intangible assets:
Long-lived intangible assets, Gross Carrying Amount	1,305	1,302
Long-lived intangible assets, Accumulated Amortization	(1,044)	(911)
Long-lived intangible assets, Net	261	391
Developed technology [Member]
Intangible assets:
Long-lived intangible assets, Gross Carrying Amount	829	827
Long-lived intangible assets, Accumulated Amortization	(740)	(694)
Long-lived intangible assets, Net	$ 89	$ 133

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274

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