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Note 3 - Business Combinations, Goodwill and Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2018
Notes Tables |
Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block] |
|  | Estimated useful lives |  |  | As of December 31, |
|  | (in years) |  |  | 201 8 |  |  | 201 7 |
Tradename |  |  | 5 | to | 7 |  |  | $ | 555 |  |  | $ | 555 |
Patents and technological know-how |  |  |  | 10 |  |  |  |  | 13,377 |  |  |  | 8,578 |
Proprietary software |  |  | 3 | to | 15 |  |  |  | 2,981 |  |  |  | 2,981 |
Other |  |  | 3 | to | 5 |  |  |  | 323 |  |  |  | 323 |
Total intangible assets, gross |  |  |  |  |  |  |  |  | 17,236 |  |  |  | 12,437 |
Accumulated amortization |  |  |  |  |  |  |  |  | (6,987 | ) |  |  | (5,894 | )
Total intangible assets, net |  |  |  |  |  |  |  | $ | 10,249 |  |  | $ | 6,543 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
Years ending December 31, |  |  |  |
2019 |  | $ | 1,226 |
2020 |  |  | 1,048 |
2021 |  |  | 1,048 |
2022 |  |  | 1,048 |
2023 |  |  | 866 |
Thereafter |  |  | 5,013 |
Total |  | $ | 10,249 |

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