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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
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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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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