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Goodwill and Intangible Assets, Net (Tables) | 12 Months Ended
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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, 2022 | 49,085 |
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,
| 2023 |  | 2022
(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 names | 450 |  |  | (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) | 2023 |  | 2022 |  | 2021
Cost of sales | $ | 443 |  |  | $ | 49 |  |  | $ | 27 |
Selling, general and administrative expenses | 4,440 |  |  | 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 |
2025 | 4,552 |
2026 | 3,830 |
2027 | 3,135 |
2028 | 2,506 |
Thereafter | 6,231 |
Total | $ | 25,349 |

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