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Note 4 - Intangible Assets (Details Textual) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
May. 31, 2015 | May. 25, 2014 | May. 26, 2013
Food Products Technology [Member] |  |  |
Goodwill | $ 35,700,000 | $ 35,700,000 | $ 35,700,000
HA Based Biomaterials [Member] |  |  |
Goodwill | 13,900,000 | 13,900,000 | $ 13,900,000
Trademarks and Trade Names [Member] |  |  |
Finite-Lived Intangible Assets, Accumulated Amortization | $ 872,000 | 872,000 |
Customer Relationships [Member] | Lifecore [Member] |  |  |
Finite-Lived Intangible Asset, Useful Life | 12 years |  |
Customer Relationships [Member] | Apio [Member] |  |  |
Finite-Lived Intangible Asset, Useful Life | 13 years |  |
Customer Relationships [Member] |  |  |
Finite-Lived Intangible Assets, Accumulated Amortization | $ 3,400,000 | 2,500,000 |
Lifecore [Member] |  |  |
Finite-Lived Customer Relationships, Gross | 3,700,000 |  |
Apio [Member] |  |  |
Finite-Lived Customer Relationships, Gross | 7,500,000 |  |
Goodwill | 49,620,000 | 49,620,000 |
Goodwill, Impaired, Accumulated Impairment Loss | 4,800,000 | $ 4,800,000 |
Finite-Lived Intangible Assets, Amortization Expense, Year Two | 885,000 |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Three | 885,000 |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Four | 885,000 |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Five | 885,000 |  |
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year | $ 885,000 |  |

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- Definition Gross carrying amount before accumulated amortization as of the balance sheet date to an asset acquired in a business combination representing a favorable existing relationship with customers having a finite beneficial life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Useful life of finite-lived intangible assets, 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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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized in the remainder of the fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References No definition available. + Details
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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