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Intangible Assets (Tables) | 6 Months Ended
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Jul. 01, 2016
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Finite-Lived Intangible Assets [Table Text Block] | Intangible assets, net consisted of the following (in thousands):
|  | July 1, 2016 |  | January 1, 2016 |
|  | Gross Carrying Amount |  | Accumulated Amortization |  | Net |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net |
Long-lived intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Patents and licenses |  | $ | 9,303 |  | $ | (8,951) |  | $ | 352 |  | $ | 9,207 |  | $ | (8,891) |  | $ | 316 |
Customer relationships |  |  | 1,526 |  |  | (1,297) |  |  | 229 |  |  | 1,305 |  |  | (1,044) |  |  | 261 |
Developed technology |  |  | 970 |  |  | (892) |  |  | 78 |  |  | 829 |  |  | (740) |  |  | 89 |
Total |  | $ | 11,799 |  | $ | (11,140) |  | $ | 659 |  | $ | 11,341 |  | $ | (10,675) |  | $ | 666 |

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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=66006027&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=66006027&loc=d3e16265-109275 + Details
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