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Intangible Assets
 12 Months Ended
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