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%

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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

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- Definition

Quarterly decrease in notional amount of interest rate cash flow hedge derivatives.

+ References

No definition available.

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- Definition

Fixed interest rate that will be received or paid upon exercise of the interest rate swaption contract.

+ References

No definition available.

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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

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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

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