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INTANGIBLE ASSETS (Tables) | 3 Months Ended
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Mar. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Intangible Assets and Goodwill [Table Text Block] | The components of intangible assets, net consisted of the following (amounts in thousands):
| Weighted Average Useful Lives (in years) March 31, 2022 |  | March 31, 2022 |  | December 31, 2021
Amortizable intangible assets: |  |  |  |  |
Patents, trademarks and other | 11.20 |  | $ | 9,457 |  |  | $ | 10,084 |
Less accumulated amortization |  |  | (7,998) |  |  | (8,586) |
|  |  | $ | 1,459 |  |  | $ | 1,498 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] | The estimated aggregate amortization expense at March 31, 2022 for each of the years (or other periods) set forth below was as follows (amounts in thousands):
April 1 - December 31, 2022 | $ | 106 |
2023 | 145 |
2024 | 132 |
2025 | 123 |
2026 | 123 |
Thereafter | 830 |
| $ | 1,459 |

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