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Note 19 - Financial Instruments - Change in Fair Value of Contingent Consideration Liability (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Fair value adjustments (note 4)	$ (6,487)	$ (591)
Balance	50,300
Less: current portion	18,657	4,884
Non-current portion	31,643	27,382
Fair Value, Inputs, Level 3 [Member]
Balance	32,266	29,119
Amounts recognized on acquisitions	21,477	12,056
Fair value adjustments (note 4)	1,054	(4,591)
Resolved and settled in cash	(6,169)	(1,434)
Other	1,672	(2,884)
Balance	50,300	32,266
Less: current portion	18,657	4,884
Non-current portion	$ 31,643	$ 27,382

X

- Definition

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+ References

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- Definition

Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Topic 805
-SubTopic 30
-Section 50
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-Subparagraph (a)(1)
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