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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
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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

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- 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 + Details
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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 + Details
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