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Note 4 - Goodwill and Other Intangible Assets - Goodwill (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019
Goodwill, gross | $ 23,966 | $ 21,993 |
Accumulated impairment charges |  | 0 |
Goodwill | 23,966 | 21,993 | $ 10,800
Goodwill allocation related to acquisition | 588 |  |
Foreign currency translation | 1,385 |  |
North America [Member] |  |  |
Goodwill, gross | 7,855 | 7,179 |
Accumulated impairment charges |  | 0 |
Goodwill | 7,855 | 7,179 |
Goodwill allocation related to acquisition | 0 |  |
Foreign currency translation | 676 |  |
Asia [Member] |  |  |
Goodwill, gross | 16,111 | 14,814 |
Accumulated impairment charges |  | 0 |
Goodwill | 16,111 | 14,814 |
Goodwill allocation related to acquisition | 588 |  |
Foreign currency translation | 709 |  |
Europe [Member] |  |  |
Goodwill, gross | 0 | 0 |
Accumulated impairment charges |  | 0 |
Goodwill | 0 | $ 0 |
Goodwill allocation related to acquisition | 0 |  |
Foreign currency translation | $ 0 |  |

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