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Intangible Assets (Tables)
 12 Months Ended
Jan. 02, 2016
Goodwill and Intangible Assets Disclosure [Abstract]  
Components of Intangible Assets
Intangible assets, net consist of the following (in thousands):
 
January 2,
2016
 
January 3,
2015
Cost
 
 
 
Patents
$
21,619

 
$
20,459

Customer relationships
7,669

 
7,669

Acquired technology
5,580

 
5,580

Trademarks
3,944

 
3,562

Capitalized software development costs
2,539

 
2,066

Other
2,541

 
1,450

     Total cost
43,892

 
40,786

Accumulated amortization
 
 
 
Patents
(7,743
)
 
(6,649
)
Customer relationships
(2,620
)
 
(1,853
)
Acquired technology
(1,950
)
 
(1,392
)
Trademarks
(1,106
)
 
(866
)
Capitalized software development costs
(1,647
)
 
(1,440
)
Other
(1,270
)
 
(815
)
     Total accumulated amortization
(16,336
)
 
(13,015
)
     Net carrying amount
$
27,556

 
$
27,771
Estimated Amortization Expense
Estimated amortization expense for each of the next fiscal years is as follows (in thousands):
Fiscal year
Amount
2016
$
3,461

2017
3,318

2018
3,189

2019
2,922

2020
2,805

Thereafter
11,861

     Total
$
27,556