| Goodwill and Intangible Assets Disclosure [Text Block] |
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| NOTE 3 — INTANGIBLE ASSETS, NET AND GOODWILL |
Intangible assets, net consisted of the following:
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(in thousands) |
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March 31, 2022 |
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December 31, 2021 |
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March 31, 2021 |
| Intangible assets with definite lives: |
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| Patents and purchased technology |
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$ |
14,198 |
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14,198 |
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14,198 |
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| Customer relationships |
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23,000 |
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23,000 |
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23,000 |
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| Gross carrying amount |
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37,198 |
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37,198 |
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37,198 |
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| Accumulated amortization: |
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| Patents and purchased technology |
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(14,198) |
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(14,198) |
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(14,198) |
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| Customer relationships |
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(19,425) |
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(19,013) |
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(17,775) |
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| Accumulated amortization |
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(33,623) |
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(33,211) |
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(31,973) |
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| Net carrying amount |
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3,575 |
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3,987 |
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5,225 |
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| Intangible assets with indefinite lives |
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97,921 |
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97,921 |
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97,921 |
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| Intangible assets, net |
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$ |
101,496 |
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$ |
101,908 |
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$ |
103,146 |
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