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Goodwill and Intangible Assets, Net (Tables) | 9 Months Ended
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Sep. 30, 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, 2020 | $ | 48,614 |
Foreign exchange effects | (104) |
Balance at September 30, 2021 | $ | 48,510 |
Components of Intangible Assets, Net | The components of intangible assets, net were as follows:
| September 30, 2021 |  | December 31, 2020
(In thousands) | Gross (1) |  | Accumulated Amortization (1) |  | Net |  | Gross (1) |  | Accumulated Amortization (1) |  | Net
Capitalized software development costs | $ | 1,018 |  |  | $ | (15) |  |  | $ | 1,003 |  |  | $ | 477 |  |  | $ | — |  |  | $ | 477 |
Customer relationships | 8,100 |  |  | (4,859) |  |  | 3,241 |  |  | 8,100 |  |  | (4,329) |  |  | 3,771 |
Developed and core technology | 4,080 |  |  | (3,262) |  |  | 818 |  |  | 4,080 |  |  | (3,044) |  |  | 1,036 |
Distribution rights | 333 |  |  | (268) |  |  | 65 |  |  | 352 |  |  | (261) |  |  | 91 |
Patents | 23,944 |  |  | (8,603) |  |  | 15,341 |  |  | 21,601 |  |  | (7,574) |  |  | 14,027 |
Trademarks and trade names | 800 |  |  | (573) |  |  | 227 |  |  | 800 |  |  | (492) |  |  | 308 |
Total intangible assets, net | $ | 38,275 |  |  | $ | (17,580) |  |  | $ | 20,695 |  |  | $ | 35,410 |  |  | $ | (15,700) |  |  | $ | 19,710 |
(1)This table excludes the gross value of fully amortized intangible assets totaling $43.1 million and $42.7 million at September 30, 2021 and December 31, 2020, respectively.
Finite-lived Intangible Assets Amortization Expense | Amortization expense by statement of operations caption was as follows:
(In thousands) | Three Months Ended September 30, |  | Nine Months Ended September 30,
2021 |  | 2020 |  | 2021 |  | 2020
Cost of sales | $ | 7 |  |  | $ | — |  |  | $ | 15 |  |  | $ | — |
Selling, general and administrative expenses | 938 |  |  | 1,752 |  |  | 2,622 |  |  | 5,472 |
Total amortization expense | $ | 945 |  |  | $ | 1,752 |  |  | $ | 2,637 |  |  | $ | 5,472 |
Estimated Future Amortization Expense Related to Intangible Assets | Estimated future annual amortization expense related to our intangible assets at September 30, 2021, was as follows:
(In thousands) |
2021 (remaining 3 months) | $ | 885 |
2022 | 3,929 |
2023 | 3,764 |
2024 | 2,776 |
2025 | 2,457 |
Thereafter | 6,884 |
Total | $ | 20,695 |

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