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Note 14 - Fair Value of Financial Instruments and Non-financial Assets and Liabilities (Details Textual) - USD ($) $ in Thousands |  | 28 Months Ended |
--- | --- | --- | ---
May. 18, 2012 | Dec. 27, 2015 | May. 31, 2013
Forward Contracts [Member] |  |  |
Number of Foreign Currency Derivatives Held |  | 0 |
Interest Rate Swap [Member] | Cash Flow Hedging [Member] |  |  |
Derivative, Notional Amount | $ 50,000 | $ 50,000 | $ 85,000
Interest Rate Swap [Member] |  |  |
Derivative, Notional Amount |  | 50,000 |
Maximum Length of Time Hedged in Interest Rate Cash Flow Hedge | 5 years |  |
Quarterly Decrease in Notional Amount of Interest Rate Cash Flow Hedge Derivatives |  | $ 5,000 |
Derivative, Swaption Interest Rate |  | 1.06% |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Maximum period the entity is hedging its exposure to the variability in future cash flows for forecasted transactions, excluding those forecasted transactions related to the payment of variable interest on existing financial instruments, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994 + Details
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- Definition Number of foreign currency exchange rate derivatives held by the entity at the reporting date. + 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=56946850&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=56946850&loc=SL5579245-113959 + Details
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