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Note 3 - Business Combinations, Goodwill and Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2017
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) |  |  | 2017 |  |  | 2016 |
Tradename |  |  | 5 | to | 7 |  |  | $ | 555 |  |  | $ | 555 |
Patents and technological know-how |  |  |  | 10 |  |  |  |  | 8,578 |  |  |  | 6,010 |
Proprietary software |  |  | 3 | to | 15 |  |  |  | 2,981 |  |  |  | 4,341 |
Other |  |  | 3 | to | 5 |  |  |  | 323 |  |  |  | 324 |
Total intangible assets, gross |  |  |  |  |  |  |  |  | 12,437 |  |  |  | 11,230 |
Accumulated amortization |  |  |  | (5,894 | ) |  |  | (5,553 | )
Total intangible assets, net |  |  | $ | 6,543 |  |  | $ | 5,677 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
Years ending December 31, |  |  |  |
2018 |  | $ | 935 |
2019 |  |  | 831 |
2020 |  |  | 652 |
2021 |  |  | 652 |
2022 |  |  | 652 |
Thereafter |  |  | 2,821 |
Total |  | $ | 6,543 |

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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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