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Note 24 - Subsequent Events (Details Textual) $ in Thousands | 2 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Feb. 28, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Jan. 31, 2018
Business Combination, Consideration Transferred |  | $ 78,221 | $ 94,129 |
Ovenia Group Oy [Member] | Subsequent Event [Member] |  |  |  |
Entity Number of Employees |  |  |  | 500
Ovenia Group Oy and IREA Corporate Finance SL [Member] | Subsequent Event [Member] |  |  |  |
Business Combination, Consideration Transferred | $ 82,002 |  |  |

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