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Note 4 - Investments in Non-public Companies (Details) (USD $)
 3 Months Ended 6 Months Ended 0 Months Ended 1 Months Ended 0 Months Ended 1 Months Ended 3 Months Ended 6 Months Ended
Nov. 24, 2013
Nov. 25, 2012
Nov. 24, 2013
Nov. 25, 2012
Feb. 15, 2011
Preferred Stock [Member]
Windset [Member]
Feb. 15, 2011
Common Stock [Member]
Apio [Member]
Windset [Member]
Feb. 15, 2011
Common Stock [Member]
Windset [Member]
May 30, 2010
Aesthetic Sciences [Member]
Nov. 24, 2013
Aesthetic Sciences [Member]
May 26, 2013
Aesthetic Sciences [Member]
Jul. 16, 2010
Aesthetic Sciences [Member]
Feb. 15, 2011
Windset [Member]
May 31, 2013
Windset [Member]
May 31, 2012
Windset [Member]
Nov. 24, 2013
Windset [Member]
Nov. 25, 2012
Windset [Member]
Nov. 24, 2013
Windset [Member]
Nov. 25, 2012
Windset [Member]
Note 4 - Investments in Non-public Companies (Details) [Line Items]                                    
Long-term Investments                 $ 793,000 $ 793,000 $ 1,800,000              
Other than Temporary Impairment Losses, Investments               1,000,000                    
Investment in Non-Public Company Shares (in Shares)         150,000 201                        
Payments to Acquire Investments           201 15,000,000                      
Investment Ownership Percentage                       20.10%            
Preferred Stock, Dividend Rate, Percentage                       7.50%            
Dividends and Interest Paid                         1,100,000 1,100,000        
Investment Income, Dividend 281,000 281,000 563,000 563,000                            
Change in Market Value Of Investment in Company                             $ 2,300,000 $ 1,000,000 $ 7,700,000 $ 5,300,000