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INTANGIBLE ASSETS (Tables) | 12 Months Ended
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Dec. 31, 2021
Intangible Assets, Net (Excluding Goodwill) [Abstract] |
Schedule of Intangible Assets and Goodwill [Table Text Block] | The components of intangible assets for each of the years ended December 31, 2021 and 2020, were as follows (amounts in thousands):
| Weighted- Average Useful Lives (in Years) |  | 2021 |  | 2020
Amortizable intangible assets: |  |  |  |  |
Patents, trademarks, and other | 11.41 |  | $ | 10,084 |  |  | $ | 10,181 |
Total at cost |  |  | 10,084 |  |  | 10,181 |
Less accumulated amortization |  |  | (8,586) |  |  | (8,206) |
|  |  | $ | 1,498 |  |  | $ | 1,975 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] | The estimated aggregate amortization expense at December 31, 2021, for each of the years (or other periods) set forth below was as follows (amounts in thousands):
2022 | $ | 145 |
2023 | 145 |
2024 | 132 |
2025 | 123 |
2026 | 123 |
Thereafter | 830 |
| $ | 1,498 |

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