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Goodwill and Intangible Assets, Net (Tables)
 3 Months Ended
Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill
Changes in the carrying amount of goodwill were as follows:
(In thousands)
 
Balance at December 31, 2016
$
43,052

Foreign exchange effects
(4
)
Balance at March 31, 2017
$
43,048

 
Schedule of Components of Intangible Assets
The components of intangible assets, net were as follows:
 
March 31, 2017
 
December 31, 2016
(In thousands)
Gross (1)
 
Accumulated
Amortization (1)
 
Net
 
Gross (1)
 
Accumulated
Amortization (1)
 
Net
Distribution rights
$
302

 
$
(119
)
 
$
183

 
$
302

 
$
(119
)
 
$
183

Patents
11,345

 
(3,988
)
 
7,357

 
12,038

 
(4,775
)
 
7,263

Trademarks and trade names
2,396

 
(1,371
)
 
1,025

 
2,400

 
(1,310
)
 
1,090

Developed and core technology
12,578

 
(4,569
)
 
8,009

 
12,585

 
(4,068
)
 
8,517

Capitalized software development costs
142

 
(24
)
 
118

 
142

 
(5
)
 
137

Customer relationships
27,654

 
(17,011
)
 
10,643

 
27,703

 
(16,344
)
 
11,359

Total intangible assets, net
$
54,417

 
$
(27,082
)
 
$
27,335

 
$
55,170

 
$
(26,621
)
 
$
28,549

 
(1) 
This table excludes the gross value of fully amortized intangible assets totaling $11.2 million and $10.2 million at March 31, 2017 and December 31, 2016, respectively.
Intangible Assets Amortization Expense
Amortization expense by income statement caption was as follows:
 
Three Months Ended March 31,
(In thousands)
2017
 
2016
Cost of sales
$
19

 
$
21

Selling, general and administrative expenses
1,581

 
1,533

Total amortization expense
$
1,600

 
$
1,554
Schedule of Estimated Future Amortization Expense
Estimated future annual amortization expense related to our intangible assets at March 31, 2017, is as follows:
(In thousands)
 
2017 (remaining 9 months)
$
4,797

2018
6,364

2019
6,285

2020
5,196

2021
1,782

Thereafter
2,911

Total
$
27,335