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Note 1 - Organization, Basis of Presentation and Summary of Significant Accounting Policies (Details) (USD $)
 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended
May 26, 2013
May 27, 2012
May 29, 2011
May 30, 2010
May 26, 2013
Top Five Customers [Member]
Sales Revenue, Goods, Net [Member]
May 27, 2012
Top Five Customers [Member]
Sales Revenue, Goods, Net [Member]
May 26, 2013
Top Customer From Food Products Technology Segment [Member]
Sales Revenue, Goods, Net [Member]
May 27, 2012
Top Customer From Food Products Technology Segment [Member]
Sales Revenue, Goods, Net [Member]
May 26, 2013
Top Customer From Food Products Technology Segment [Member]
Accounts Receivable [Member]
May 27, 2012
Top Customer From Food Products Technology Segment [Member]
Accounts Receivable [Member]
May 26, 2013
Second Top Customer From Food Products Technology Segment [Member]
Sales Revenue, Goods, Net [Member]
May 26, 2013
International Customers [Member]
Sales Revenue, Goods, Net [Member]
May 27, 2012
International Customers [Member]
Sales Revenue, Goods, Net [Member]
May 26, 2013
Two of International Customers Individually [Member]
Sales Revenue, Goods, Net [Member]
May 27, 2012
One of International Customer [Member]
Sales Revenue, Goods, Net [Member]
May 26, 2013
HA-based Biomaterials [Member]
May 26, 2013
Food Products Technology [Member]
Jul. 21, 2013
Food Products Technology [Member]
May 27, 2012
Food Products Technology [Member]
May 29, 2011
Food Products Technology [Member]
May 30, 2010
Food Products Technology [Member]
May 26, 2013
Restricted Stock Units (RSUs) [Member]
May 27, 2012
Restricted Stock Units (RSUs) [Member]
May 29, 2011
Restricted Stock Units (RSUs) [Member]
May 26, 2013
Stock Options [Member]
May 27, 2012
Stock Options [Member]
May 29, 2011
Stock Options [Member]
May 30, 2010
Stock Options [Member]
May 26, 2013
Stock Options [Member]
May 27, 2012
Stock Options [Member]
May 29, 2011
Stock Options [Member]
May 26, 2013
Buildings and Leasehold Improvements [Member]
Minimum [Member]
May 26, 2013
Buildings and Leasehold Improvements [Member]
Maximum [Member]
May 26, 2013
Furniture and Fixtures, Computers, Capitalized Software, Capitalized Leases, Machinery, Equipment and Autos [Member]
Minimum [Member]
May 26, 2013
Furniture and Fixtures, Computers, Capitalized Software, Capitalized Leases, Machinery, Equipment and Autos [Member]
Maximum [Member]
May 26, 2013
Software Development [Member]
Minimum [Member]
May 26, 2013
Software Development [Member]
Maximum [Member]
May 26, 2013
Beachside [Member]
May 27, 2012
Beachside [Member]
May 29, 2011
Beachside [Member]
May 26, 2013
Short Term [Member]
May 27, 2012
Short Term [Member]
May 27, 2012
Second Top Customer From Food Products Technology Segment [Member]
Sales Revenue, Goods, Net [Member]
May 26, 2013
Windset [Member]
May 26, 2013
Minimum [Member]
May 26, 2013
Maximum [Member]
Note 1 - Organization, Basis of Presentation and Summary of Significant Accounting Policies (Details) [Line Items]                                                                                            
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners 20.10% 20.10%                                                                                   20.10%    
Concentration Risk, Percentage         40.00% 45.00% 16.00% 17.00% 15.00% 11.00% 13.00% 30.00% 36.00% 5.00% 5.00%                                                       11.00%      
Certificates of Deposit, at Carrying Value $ 701,000 $ 0                                                                                        
Marketable Securities Contractual Maturity 1 year                                                                                       1 year 2 years
Marketable Securities 251,000 0                                                                             1,300,000 0        
Proceeds from Sale and Maturity of Marketable Securities 0 27,700,000                                                                                        
Advertising Expense 445,000 406,000 458,000                                                                                      
Revenue from Related Parties 2,134,000 3,138,000 3,391,000                                                                     2,500,000 3,800,000 4,100,000            
Accounts Receivable, Related Parties                                                                           671,000 323,000              
Related Party Costs 6,700,000 5,600,000 3,600,000                                                                                      
Accounts Payable, Related Parties 786,000 776,000                                                                                        
Property, Plant and Equipment, Useful Life                                                               3 years 30 years 3 years 7 years 3 years 7 years                  
Finite-Lived Intangible Asset, Useful Life                                                                                         12 years 13 years
Goodwill 49,620,000 49,620,000 36,462,000 41,154,000                       13,900,000 35,739,000   35,739,000 22,581,000 22,581,000                                                  
Fair Value Assumptions, Expected Term                               5 years 5 years                                                          
Fair Value Assumption, Effective Tax Rate                               37.00% 37.00%                                                          
Percentage of Estimated Fair Value Exceeds Net Book Value                               117.00%   111.00%                                                        
Projected Cash Flow                               8,400,000 10,200,000                                                          
Cash, Period Increase (Decrease)                               13,200,000 13,600,000                                                          
Difference between Projected Cash Flow and Actual Cash Flow                               4,800,000 3,400,000                                                          
Cost-method Investments, Realized Losses       1,000,000                                                                                    
Cost Method Investments 793,000 793,000                                                                                        
Deferred Revenue 1,200,000 162,000                                                                                        
Noncontrolling Interest, Ownership Percentage by Parent 60.00%                                                                                          
Stockholders' Equity Attributable to Noncontrolling Interest 1,721,000 1,816,000                                                                                        
Deferred Tax Assets, Valuation Allowance 783,000 419,000                                                                                        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares)                                                         88,022 1,855,167 2,032,867                              
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price (in Dollars per share)                                                 $ 6.58 $ 6.50 $ 6.34 $ 6.13 $ 12.80 $ 6.72 $ 6.67                              
Share-based Compensation $ 1,695,000 $ 1,872,000 $ 1,951,000                                     $ 907,000 $ 826,000 $ 857,000 $ 788,000 $ 1,046,000 $ 1,094,000                                      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share) $ 3.57 $ 2.65 $ 2.42                                           $ 3.57