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Note 7 - Intangible Assets (Details) (USD $)
 12 Months Ended
May 25, 2014
May 26, 2013
May 25, 2014
Trademarks and Trade Names [Member]
May 26, 2013
Trademarks and Trade Names [Member]
May 25, 2014
Customer Relationships [Member]
Lifecore [Member]
May 25, 2014
Customer Relationships [Member]
Apio, Inc [Member]
May 25, 2014
Customer Relationships [Member]
May 26, 2013
Customer Relationships [Member]
May 25, 2014
Lifecore [Member]
May 25, 2014
Apio, Inc [Member]
Note 7 - Intangible Assets (Details) [Line Items]                    
Finite-Lived Intangible Assets, Accumulated Amortization     $ 872,000 $ 872,000     $ 2,500,000 $ 1,600,000    
Goodwill, Impaired, Accumulated Impairment Loss 4,800,000 4,800,000                
Finite-Lived Customer Relationships, Gross                 3,700,000 7,500,000
Finite-Lived Intangible Asset, Useful Life         12 years 13 years        
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 885,000                  
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