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Note 5 - Acquisition-related Items (Tables) | 12 Months Ended
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Dec. 31, 2014
Business Combination Disclosure Acquisition Related Items [Abstract] |
Schedule of Acquisition-Related Expenses [Table Text Block] |
|  | 2014 |  |  | 2013 |  |  | 2012 |
Transaction costs |  | $ | 9,454 |  |  | $ | 3,336 |  |  | $ | 5,032 |
Contingent consideration fair value adjustments |  |  | 2,145 |  |  |  | 1,801 |  |  |  | 3,645 |
Contingent consideration compensation expense |  |  | 226 |  |  |  | 6,181 |  |  |  | 5,096 |
Reclassification from accumulated other comprehensive loss |  |  | - |  |  |  | - |  |  |  | 2,553 |
Gain on revaluation of previously held equity investment (note 3) |  |  | - |  |  |  | (820 | ) |  |  | - |
|  | $ | 11,825 |  |  | $ | 10,498 |  |  | $ | 16,326 |

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