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Intangible Assets Intangible Assets - Schedule of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Apr. 01, 2017 | Dec. 30, 2017
Finite-Lived Intangible Assets [Line Items] |  |  |
Amortization of Intangible Assets | $ 1,100 | $ 1,100 |
Total intangible assets | 55,253 |  | $ 51,798
Accumulated amortization | (25,800) |  | (24,675)
Intangible assets, net | 29,453 |  | 27,123
Patents |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Total intangible assets | 21,558 |  | 20,623
Licenses-related party |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Total intangible assets | 8,000 |  | 7,500
Customer relationships |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Total intangible assets | 7,669 |  | 7,669
Acquired technology |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Total intangible assets | 5,580 |  | 5,580
Trademarks |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Total intangible assets | 4,112 |  | 4,036
Capitalized software development costs |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Total intangible assets | 2,868 |  | 2,699
Other |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Total intangible assets | $ 5,466 |  | $ 3,691

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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