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Note 4 - Goodwill and Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2020
Notes Tables |
Schedule of Goodwill [Table Text Block] |
|  | December 31, |
(in thousands) |  | 2020 |  |  | 2019 |
Balance at beginning of year |  | $ | 57,381 |  |  | $ | 57,304 |
Effect of change in currency translation |  |  | 1,209 |  |  |  | 77 |
Balance at end of year |  | $ | 58,590 |  |  | $ | 57,381 |
Schedule of Intangible Assets and Goodwill [Table Text Block] |
|  |  |  |  |  | December 31, |
|  |  |  |  |  | 2020 |  |  | 2019 |
|  | Weighted |  |  | (in thousands) |
Amortizable intangible assets: |  | Average Life* (Years) |  |  | Gross |  |  | Accumulated Amortization |  |  | Net |  |  | Gross |  |  | Accumulated Amortization |  |  | Net |
Distribution agreements/customer relationships |  |  | 8.8 |  |  | $ | 18,237 |  |  | $ | (7,746 | ) |  | $ | 10,491 |  |  | $ | 17,891 |  |  | $ | (6,340 | ) |  | $ | 11,551 |
Existing technology |  |  | 5.2 |  |  |  | 38,761 |  |  |  | (20,674 | ) |  |  | 18,087 |  |  |  | 41,222 |  |  |  | (19,698 | ) |  |  | 21,524 |
Trade names and patents |  |  | 5.4 |  |  |  | 8,681 |  |  |  | (4,362 | ) |  |  | 4,319 |  |  |  | 7,910 |  |  |  | (3,715 | ) |  |  | 4,195 |
Total amortizable intangible assets |  |  |  |  |  | $ | 65,679 |  |  | $ | (32,782 | ) |  | $ | 32,897 |  |  | $ | 67,023 |  |  | $ | (29,753 | ) |  | $ | 37,270 |
Indefinite-lived intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 254 |  |  |  |  |  |  |  |  |  |  |  | 1,135 |
Total intangible assets |  |  |  |  |  |  |  |  |  |  |  |  |  | $ | 33,151 |  |  |  |  |  |  |  |  |  |  | $ | 38,405 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
|  | Amortization |
Year Ending December 31, |  | Expense |
|  | (in thousands) |
2021 |  | $ | 5,774 |
2022 |  |  | 5,740 |
2023 |  |  | 5,627 |
2024 |  |  | 5,318 |
2025 |  |  | 4,204 |
Thereafter |  |  | 6,234 |
Total |  | $ | 32,897 |

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