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Intangible Assets, Net (Tables) | 12 Months Ended
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Dec. 28, 2012
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Finite-Lived Intangible Assets [Table Text Block] | Intangible assets, net, consisted of the following (in thousands):
|  | December 28, 2012 |  |  | December 30, 2011 |
|  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net |
Amortized intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Patents and licenses |  | $ | 10,786 |  |  | $ | (9,875 | ) |  | $ | 911 |  |  | $ | 10,868 |  |  | $ | (9,508 | ) |  | $ | 1,360 |
Customer relationships |  |  | 1,835 |  |  |  | (917 | ) |  |  | 918 |  |  |  | 2,023 |  |  |  | (809 | ) |  |  | 1,214 |
Developed technology |  |  | 1,166 |  |  |  | (853 | ) |  |  | 313 |  |  |  | 1,286 |  |  |  | (871 | ) |  |  | 415 |
Total |  | $ | 13,787 |  |  | $ | (11,645 | ) |  | $ | 2,142 |  |  | $ | 14,177 |  |  | $ | (11,188 | ) |  | $ | 2,989
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] | The following table shows estimated amortization expense for intangible assets for each of the next five succeeding years (in thousands):
Fiscal Year |  | Amount |
2013 |  | $ | 477 |
2014 |  |  | 428 |
2015 |  |  | 296 |
2016 |  |  | 294 |
2017 |  |  | 290 |
Thereafter |  |  | 357 |
Total |  | $ | 2,142

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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + References No definition available. + Details
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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + 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) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16265-109275 + Details
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