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Note 7 - Derivative Instruments and Hedging Activities - Fair Value Adjustments of Forward Currency Forward Contracts Not Designated as Hedges (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Gain (loss) on settlement	$ 383	$ 198	$ (254)	[1]
Foreign Exchange Forward [Member] | Not Designated as Hedging Instrument [Member]
Gain (loss) on settlement		(115)	(47)
Gain (loss) on change in fair value		$ 313	$ (207)
Foreign Exchange Forward [Member] | Not Designated as Hedging Instrument [Member] | Maximum [Member]
Gain (loss) on settlement	(117)
Gain (loss) on change in fair value	$ 500
[1] The Company has initially applied ASC 2016-02 (Topic 842) on January 1, 2019 (note 2 (u)). The accounting standard was adopted using the modified retrospective method, under this method the comparative period was not restated.

X

- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959

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X

- Definition

The difference between the book value and the sale price of options, swaps, futures, forward contracts, and other derivative instruments. This element refers to the gain (loss) included in earnings.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.13(h))
-URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260

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