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GOODWILL AND OTHER INTANGIBLE ASSETS (Tables) | 3 Months Ended
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Mar. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill | Changes in the carrying amount of goodwill consisted of the following:
| Three Months Ended March 31,
| 2022 |  |
| (In thousands)
Beginning balance | $ | 7,470 |  |  |
Acquisition of business | — |  |  |
Impairment losses | — |  |  |
Ending balance | $ | 7,470 |  |  |
Schedule of Finite-Lived Intangible Assets | Other intangible assets, net consisted of the following:
| March 31, 2022
| Weighted Average Amortization Period |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Book Value
|  |  | (In thousands)
Patents: |  |  |  |  |  |  |
Intellectual property operations | 6 years |  | $ | 331,403 |  |  | $ | (296,942) |  |  | $ | 34,461 |
Industrial operations | 7 years |  | 3,400 |  |  | (233) |  |  | 3,167 |
Total patents |  |  | 334,803 |  |  | (297,175) |  |  | 37,628 |
Customer relationships - industrial operations | 7 years |  | 5,300 |  |  | (364) |  |  | 4,936 |
Trade name and trademarks - industrial operations | 7 years |  | 3,430 |  |  | (235) |  |  | 3,195 |
Total |  |  | $ | 343,533 |  |  | $ | (297,774) |  |  | $ | 45,759 |
| December 31, 2021
| Weighted Average Amortization Period |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Book Value
|  |  | (In thousands)
Patents: |  |  |  |  |  |  |
Intellectual property operations | 6 years |  | $ | 331,403 |  |  | $ | (294,341) |  |  | $ | 37,062 |
Industrial operations | 7 years |  | 3,400 |  |  | (112) |  |  | 3,288 |
Total patents |  |  | $ | 334,803 |  |  | $ | (294,453) |  |  | $ | 40,350 |
Customer relationships - industrial operations | 7 years |  | 5,300 |  |  | (174) |  |  | 5,126 |
Trade name and trademarks - industrial operations | 7 years |  | 3,430 |  |  | (113) |  |  | 3,317 |
Total |  |  | $ | 343,533 |  |  | $ | (294,740) |  |  | $ | 48,793 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense | The following table presents the scheduled annual aggregate amortization expense (in thousands):
Years Ending December 31, |
Remainder of 2022 | $ | 9,102 |
2023 | 12,068 |
2024 | 10,692 |
2025 | 8,348 |
2026 | 2,483 |
Thereafter | 3,066 |
Total | $ | 45,759 |

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