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Note 7 - Derivative Instruments and Hedging Activities - Effects of Derivative Instruments on Income and Other Comprehensive Income (OCI) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Foreign Exchange Forward [Member]
Amount of Gain or (Loss) Recognized in OCI, net of tax, on Derivative	$ 2,026	$ 1,283	$ (810)
Interest Rate Swap [Member]
Amount of Gain or (Loss) Recognized in OCI, net of tax, on Derivative	(163)
Operating Expense [Member] | Foreign Exchange Forward [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Amount of Gain or Reclassified from AOCI into Income	(188)	(197)	(245)
Cost of Sales [Member] | Foreign Exchange Forward [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Amount of Gain or Reclassified from AOCI into Income	(66)	(43)	(36)
Interest Expense, Net [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Amount of Gain or Reclassified from AOCI into Income	$ (17)	$ 0	$ 0

X

- Definition

The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4D
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624177-113959

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624171-113959

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- Definition

Amount, after tax and reclassification, of gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness, attributable to parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e637-108580

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