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Goodwill and Intangible Assets, Net (Tables)
 9 Months Ended
Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
Changes in the Carrying Amount of Goodwill
Changes in the carrying amount of goodwill were as follows:
(In thousands) 
Balance at December 31, 2019$48,447 
Foreign exchange effects79 
Balance at September 30, 2020$48,526 
Components of Intangible Assets, Net
The components of intangible assets, net were as follows:
 September 30, 2020December 31, 2019
(In thousands)
Gross (1)
Accumulated
Amortization (1)
Net
Gross (1)
Accumulated
Amortization (1)
Net
Distribution rights$336 $(241)$95 $322 $(210)$112 
Patents20,962 (7,294)13,668 16,587 (6,491)10,096 
Trademarks and trade names2,786 (2,435)351 2,785 (2,205)580 
Developed and core technology4,080 (2,971)1,109 12,480 (10,016)2,464 
Capitalized software development costs254 — 254 — — — 
Customer relationships31,233 (27,093)4,140 32,534 (25,956)6,578 
Total intangible assets, net$59,651 $(40,034)$19,617 $64,708 $(44,878)$19,830 
 
(1)This table excludes the gross value of fully amortized intangible assets totaling $17.6 million and $7.4 million at September 30, 2020 and December 31, 2019, respectively.
Estimated Future Amortization Expense Related to Intangible Assets
Estimated future annual amortization expense related to our intangible assets at September 30, 2020, was as follows:
(In thousands)
2020 (remaining 3 months)$1,037 
20213,391 
20223,263 
20232,999 
20242,418 
Thereafter6,509 
Total$19,617