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Amortizable Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	Apr. 04, 2014	Jan. 03, 2014
Amortized intangible assets:
Amortizable intangible assets, Gross Carrying Amount	$ 13,107	$ 13,074
Amortizable intangible assets, Accumulated Amortization	(11,819)	(11,694)
Amortizable intangible assets, Net	1,288	1,380
Patents and Licenses [Member]
Amortized intangible assets:
Amortizable intangible assets, Gross Carrying Amount	10,644	10,637
Amortizable intangible assets, Accumulated Amortization	(10,114)	(10,057)
Amortizable intangible assets, Net	530	580
Customer relationships [Member]
Amortized intangible assets:
Amortizable intangible assets, Gross Carrying Amount	1,506	1,490
Amortizable intangible assets, Accumulated Amortization	(941)	(894)
Amortizable intangible assets, Net	565	596
Developed technology [Member]
Amortized intangible assets:
Amortizable intangible assets, Gross Carrying Amount	957	947
Amortizable intangible assets, Accumulated Amortization	(764)	(743)
Amortizable intangible assets, Net	$ 193	$ 204

X

- 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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X

- 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)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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Period Type:	duration

X

- 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



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph ((a)(1),(b))

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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