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Note 2 - Acquisitions (Details) (USD $) | 12 Months Ended |  | 1 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | 0 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | ---
May 26, 2013 | May 27, 2012 | May 29, 2011 | Apr. 23, 2012 | Apr. 23, 2012 Achieving Revenue Target [Member] GreenLine [Member] | Apr. 23, 2012 Exceeding Revenue Target [Member] GreenLine [Member] | Apr. 23, 2012 Revenue Target [Member] GreenLine [Member] | May 26, 2013 GreenLine [Member] Customer Base [Member] | Apr. 23, 2012 GreenLine [Member] | May 26, 2013 GreenLine [Member] | May 27, 2012 GreenLine [Member] | May 29, 2012 Lifecore [Member] | Apr. 30, 2010 Lifecore [Member]
Note 2 - Acquisitions (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Processing Plants |  |  |  |  |  |  |  |  | 4 |  |  |  |
Business Acquisition, Cost of Acquired Entity, Cash Paid |  |  |  | $ 62,900,000 |  |  |  |  | $ 62,900,000 |  |  |  | $ 40,000,000
Business Acquisition, Escrow Deposit |  |  |  |  |  |  |  |  | 4,700,000 |  |  |  |
Business Acquisition, Contingent Consideration, Potential Cash Payment |  |  |  |  | 4,000,000 | 3,000,000 |  |  | 7,000,000 |  |  |  | 10,000,000
Revenues | 441,708,000 | 317,552,000 | 276,729,000 |  |  |  | 3,000,000 |  |  |  |  |  |
Business Acquisition, Contingent Consideration, at Fair Value |  |  |  | (3,933,000) |  |  |  |  |  |  | 3,900,000 |  |
Revenue, Net |  |  |  |  |  |  |  |  |  |  | 9,100,000 |  |
Business Acquisition, Cost of Acquired Entity, Purchase Price |  |  |  | 66,833,000 |  |  |  |  | 66,800,000 |  |  |  |
Effective Income Tax Rate, Continuing Operations | 30.00% | 36.00% | 52.00% |  |  |  |  |  |  | 40.00% |  |  |
Number of Intangible Assets Identified |  |  |  |  |  |  |  |  |  | 2 |  |  |
Indefinite Lived Intangible Assets Market Value |  |  |  |  |  |  |  |  |  | 36,000,000 |  |  |
Finite-lived Intangible Assets Acquired |  | 43,500,000 |  |  |  |  |  | 7,500,000 |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  |  |  |  |  |  | 13 years |  |  |  |  |
Business Acquisition, Purchase Price Allocation, Goodwill Amount |  |  |  | 13,158,000 |  |  |  |  |  | 13,200,000 |  |  |
Business Acquisition, Purchase Price Allocation, Net Deferred Tax Liabilities, Noncurrent |  |  |  |  |  |  |  |  |  | 1,900,000 |  |  |
Business Combination, Acquisition Related Costs |  |  |  |  |  |  |  |  |  |  | 1,400,000 |  |
Business Acquisition, Contingent Consideration, Cash Payment |  |  |  |  |  |  |  |  |  |  |  | $ 10,000,000 |

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- Definition Amount of goodwill arising from a business combination, which is the excess of the cost of the acquired entity over the amounts assigned to assets acquired and liabilities assumed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 52 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 53 -Subparagraph d -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=21917927&loc=d3e1043-128460 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 59 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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