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Goodwill and Intangible Assets, Net (Tables) | 12 Months Ended
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Dec. 31, 2021
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 effects | 167 |
Balance at December 31, 2020 | 48,614 |
Foreign exchange effects | (151) |
Balance at December 31, 2021 | $ | 48,463 |
Components of Intangible Assets | The components of intangible assets, net were as follows:
| December 31,
| 2021 |  | 2020
(In thousands) | Gross (1) |  | Accumulated Amortization (1) |  | Net (1) |  | Gross (1) |  | Accumulated Amortization (1) |  | Net (1)
Capitalized software development costs (2 years) | $ | 1,066 |  |  | $ | (27) |  |  | $ | 1,039 |  |  | $ | 477 |  |  | $ | — |  |  | $ | 477 |
Customer relationships (10-15 years) | 5,000 |  |  | (2,375) |  |  | 2,625 |  |  | 8,100 |  |  | (4,329) |  |  | 3,771 |
Developed and core technology (5-15 years) | 4,080 |  |  | (3,335) |  |  | 745 |  |  | 4,080 |  |  | (3,044) |  |  | 1,036 |
Distribution rights (10 years) | 325 |  |  | (269) |  |  | 56 |  |  | 352 |  |  | (261) |  |  | 91 |
Patents (10 years) | 24,518 |  |  | (9,015) |  |  | 15,503 |  |  | 21,601 |  |  | (7,574) |  |  | 14,027 |
Trademarks and trade names (10 years) | 800 |  |  | (599) |  |  | 201 |  |  | 800 |  |  | (492) |  |  | 308 |
Total intangible assets, net | $ | 35,789 |  |  | $ | (15,620) |  |  | $ | 20,169 |  |  | $ | 35,410 |  |  | $ | (15,700) |  |  | $ | 19,710 |
(1)This table excludes the gross value of fully amortized intangible assets totaling $43.2 million and $42.7 million on December 31, 2021 and 2020, respectively.
Amortization Expense by Income Statement Caption | Amortization expense by statement of operations caption was as follows:
| Year Ended December 31,
(In thousands) | 2021 |  | 2020 |  | 2019
Cost of sales | $ | 27 |  |  | $ | — |  |  | $ | — |
Selling, general and administrative expenses | 3,963 |  |  | 6,500 |  |  | 7,192 |
Total amortization expense | $ | 3,990 |  |  | $ | 6,500 |  |  | $ | 7,192 |
Estimated Future Amortization Expense Related to Intangible Assets | Estimated future annual amortization expense related to our intangible assets at December 31, 2021, is as follows:
(In thousands) |
2022 | $ | 3,963 |
2023 | 3,644 |
2024 | 2,692 |
2025 | 2,463 |
2026 | 2,264 |
Thereafter | 5,143 |
Total | $ | 20,169 |

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