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INTANGIBLE ASSETS (Tables) | 6 Months Ended
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Jun. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Intangible Assets and Goodwill [Table Text Block] | The components of intangible assets consisted of the following as of the dates set forth below (amounts in thousands):
| Weighted Average Useful Lives (in years) June 30, 2019 |  | June 30, 2019 |  | December 31, 2018
Amortizable intangible assets: |  |  |  |  |
Customer relationships | 8.2 |  | $ | 12,638 |  |  | $ | 12,967 |
Patents, trademarks and other | 7.6 |  | 11,445 |  |  | 11,356 |
Total at cost |  |  | 24,083 |  |  | 24,323 |
Less accumulated amortization |  |  | (13,287 | ) |  | (12,676 | )
|  |  | $ | 10,796 |  |  | $ | 11,647 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] | The estimated aggregate amortization expense at June 30, 2019, for each of the years (or other periods) set forth below was as follows (amounts in thousands):
July 1 - December 31, 2019 | $ | 1,123 |
2020 | 2,090 |
2021 | 1,372 |
2022 | 988 |
2023 | 988 |
Thereafter | 4,235 |
| $ | 10,796 |

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