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Note 4 - Goodwill and Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2021
Notes Tables |
Schedule of Goodwill [Table Text Block] |
|  | December 31, |
(in thousands) |  | 2021 |  |  | 2020 |
Balance beginning of year |  | $ | 58,590 |  |  | $ | 57,381 |
Effect of change in currency translation |  |  | (901 | ) |  |  | 1,209 |
Balance at end of year |  | $ | 57,689 |  |  | $ | 58,590 |
Schedule of Intangible Assets and Goodwill [Table Text Block] |
|  |  |  |  |  | December 31, |
|  |  |  |  |  | 2021 |  |  | 2020 |
(in thousands) |  | Average |  |  |  |  |  |  | Accumulated |  |  |  |  |  |  |  |  |  |  | Accumulated |  |  |  |  |
Amortizable intangible assets: |  | Life* |  |  | Gross |  |  | Amortization |  |  | Net |  |  | Gross |  |  | Amortization |  |  | Net |
Distribution agreements/customer relationships |  |  | 7.9 |  |  | $ | 17,689 |  |  | $ | (8,675 | ) |  | $ | 9,014 |  |  | $ | 18,237 |  |  | $ | (7,746 | ) |  | $ | 10,491 |
Existing technology |  |  | 4.2 |  |  |  | 38,707 |  |  |  | (23,962 | ) |  |  | 14,745 |  |  |  | 38,761 |  |  |  | (20,674 | ) |  |  | 18,087 |
Trade names and patents |  |  | 4.5 |  |  |  | 8,496 |  |  |  | (5,108 | ) |  |  | 3,388 |  |  |  | 8,681 |  |  |  | (4,362 | ) |  |  | 4,319 |
Total amortizable intangible assets |  |  |  |  |  | $ | 64,892 |  |  | $ | (37,745 | ) |  | $ | 27,147 |  |  | $ | 65,679 |  |  | $ | (32,782 | ) |  | $ | 32,897 |
Indefinite-lived intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 238 |  |  |  |  |  |  |  |  |  |  |  | 254 |
Total intangible assets |  |  |  |  |  |  |  |  |  |  |  |  |  | $ | 27,385 |  |  |  |  |  |  |  |  |  |  | $ | 33,151 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
|  | Amortization |
Year Ending December 31, |  | Expense |
(in thousands) |  |  |  |
2022 |  | $ | 5,766 |
2023 |  |  | 5,661 |
2024 |  |  | 5,359 |
2025 |  |  | 4,262 |
2026 |  |  | 2,452 |
Thereafter |  |  | 3,647 |
Total |  | $ | 27,147 |

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