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Goodwill and Intangible Assets, Net (Tables)
 12 Months Ended
Dec. 31, 2023
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, 2021$48,463 
Goodwill acquired during the period (1)
713 
Foreign exchange effects(91)
Balance at December 31, 202249,085 
Goodwill impairment(49,075)
Foreign exchange effects(10)
Balance at December 31, 2023$— 
(1) During the year ended December 31, 2022, we recognized $0.7 million of goodwill related to the Qterics, Inc. acquisition. Refer to Note 21 for further information about this acquisition.
Components of Intangible Assets
Estimated useful lives are as follows:
Capitalized software development
2 years
Customer relationships
10-15 years
Developed and core technology
5-15 years
Distribution rights
10 years
Patents
10 years
Trademarks and trade names
10 years
The components of intangible assets, net were as follows: 
December 31,
 20232022
(In thousands)
Gross (1)
Accumulated
Amortization (1)
Net (1)
Gross (1)
Accumulated
Amortization (1)
Net (1)
Capitalized software development costs$2,161 $(421)$1,740 $1,647 $(44)$1,603 
Customer relationships 6,340 (3,803)2,537 6,340 (3,080)3,260 
Developed and core technology 4,220 (3,754)466 4,520 (3,693)827 
Distribution rights — — — 308 (281)27 
Patents 33,195 (12,686)20,509 29,388 (10,790)18,598 
Trademarks and trade names450 (353)97 450 (295)155 
Total intangible assets, net$46,366 $(21,017)$25,349 $42,653 $(18,183)$24,470 
(1)This table excludes the gross value of fully amortized intangible assets totaling $45.0 million and $43.7 million on December 31, 2023 and 2022, respectively.
Amortization Expense by Income Statement Caption Amortization expense by statement of operations caption was as follows:
 Year Ended December 31,
(In thousands)202320222021
Cost of sales$443 $49 $27 
Selling, general and administrative expenses4,440 3,969 3,963 
Total amortization expense$4,883 $4,018 $3,990 
Estimated Future Amortization Expense Related to Intangible Assets
Estimated future annual amortization expense related to our intangible assets at December 31, 2023 is as follows: 
(In thousands) 
2024$5,095 
20254,552 
20263,830 
20273,135 
20282,506 
Thereafter6,231 
Total$25,349