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Intangible Assets | 12 Months Ended
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Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible Assets | Intangible Assets Intangible assets, net consist of the following (in thousands):
| December 31, 2016 |  | January 2, 2016
Cost |  |  |
Patents | $ | 19,950 |  |  | $ | 21,619 |
Customer relationships | 7,669 |  |  | 7,669 |
Licenses | 7,500 |  |  | — |
Acquired technology | 5,580 |  |  | 5,580 |
Trademarks | 3,777 |  |  | 3,944 |
Capitalized software development costs | 2,539 |  |  | 2,539 |
Other | 3,674 |  |  | 2,541 |
Total cost | 50,689 |  |  | 43,892 |
Accumulated amortization |  |  |
Patents | (7,427 | ) |  | (7,743 | )
Customer relationships | (3,387 | ) |  | (2,620 | )
Acquired technology | (2,508 | ) |  | (1,950 | )
Trademarks | (1,331 | ) |  | (1,106 | )
Capitalized software development costs | (1,766 | ) |  | (1,647 | )
Other | (4,894 | ) |  | (1,270 | )
Total accumulated amortization | (21,313 | ) |  | (16,336 | )
Net carrying amount | $ | 29,376 |  |  | $ | 27,556 |
Estimated amortization expense for each of the next fiscal years is as follows (in thousands):
Fiscal year | Amount
2017 | $ | 4,232 |
2018 | 3,925 |
2019 | 3,685 |
2020 | 3,329 |
2021 | 2,813 |
Thereafter | 11,392 |
Total | $ | 29,376 |

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