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Intangible Assets, Net (Tables) | 12 Months Ended
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Dec. 31, 2021
Goodwill And Intangible Assets Disclosure [Abstract] |
Schedule of Finite-Lived Intangible Assets | Intangible assets, net consisted of the following (in thousands):
|  | 2021 |  |  | 2020 |
Long-lived amortized intangible assets |  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net |
Patents and licenses |  | $ | 9,315 |  |  | $ | (9,097 | ) |  | $ | 218 |  |  | $ | 9,382 |  |  | $ | (9,112 | ) |  | $ | 270 |
Finite-lived Intangible Assets Amortization Expense | Amortization expense for intangible assets were as follows (in thousands):
|  | Years Ended |
|  | 2021 |  |  | 2020 |  |  | 2019 |
Amortization expense |  | $ | 34 |  |  | $ | 35 |  |  | $ | 34 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense | Future amortization of intangible assets is as follows (in thousands):
Year Ended |  | Amount |
2022 |  | $ | 32 |
2023 |  |  | 32 |
2024 |  |  | 32 |
2025 |  |  | 32 |
2026 |  |  | 32 |
Thereafter |  |  | 58 |
Total |  | $ | 218 |

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