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Note 12 - Income Tax - Provision for (Recovery of) Income Tax (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
Current |  |
| $ 25,634 | $ 11,586
Deferred |  |
| 1,753 | 11,826
Total | 27,387 | 23,412
Canada Revenue Agency [Member] |  |
Current |  |
Canada | 3,689 | 829
Deferred |  |
Canada | (317) | 1,352
Internal Revenue Service (IRS) [Member] |  |
Current |  |
United States | 21,945 | 10,757
Deferred |  |
United States | $ 2,070 | $ 10,474

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