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Note 4 - Derivative Instruments and Hedging Activities (Details Textual) $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Oct. 31, 2013 | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($)
Commodity Contract [Member] |  |  |  |
Derivative, Number of Instruments Held |  | 1 | 1 |
Commodity Contract [Member] | Not Designated as Hedging Instrument [Member] | Cost of Sales [Member] |  |  |  |
Derivative, Gain (Loss) on Derivative, Net |  | $ 739 | $ (1,909) | $ (629)
Commodity Contract [Member] | Maximum [Member] |  |  |  |
Derivative, Remaining Maturity |  | 1 year 180 days |  |
Foreign Exchange Contract [Member] |  |  |  |
Derivative, Number of Instruments Held |  | 38 | 6 |
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member] | Cost of Sales [Member] |  |  |  |
Derivative, Gain (Loss) on Derivative, Net |  | $ (385) | $ (624) | (149)
Foreign Exchange Contract [Member] | Maximum [Member] |  |  |  |
Derivative, Remaining Maturity |  | 1 year |  |
Interest Rate Swap [Member] |  |  |  |
Number of New Contracts Entered | 2 |  |  |
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net |  | $ 535 | (965) | (1,420)
Commodity and Foreign Currency Contracts [Member] |  |  |  |
Derivative Assets (Liabilities), Net Fair Value of Derivative Contracts, Excluding Impact of Credit Risk |  | (1,295) | (3,248) |
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net |  | $ 354 | $ (2,533) | $ (778)

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- Definition Represents the fair value of derivative contracts excluding impact of credit risk. + References No definition available. + Details
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- Definition Number of new contracts entered into during the period mentioned. + References No definition available. + Details
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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a),(c),(d),(e) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959 + Details
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- Definition The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959 + Details
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- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959 + Details
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- Definition The number of derivative instruments of a particular group held by the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5579245-113959 + Details
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- Definition Period remaining until the derivative contract matures, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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