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Note 1 - Organization, Basis of Presentation, and Summary of Significant Accounting Policies (Details) (USD $) | 12 Months Ended |  | 12 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended |  |  |  | 12 Months Ended |  |  |  |  |  | 12 Months Ended | 6 Months Ended | 12 Months Ended |  | 12 Months Ended
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May 25, 2014 | May 26, 2013 | May 27, 2012 | May 30, 2010 | May 29, 2011 | May 25, 2014 Beachside Produce LLC [Member] | May 26, 2013 Beachside Produce LLC [Member] | May 27, 2012 Beachside Produce LLC [Member] | May 25, 2014 Building [Member] | Nov. 24, 2013 Building [Member] | May 25, 2014 Building [Member] Minimum [Member] | May 25, 2014 Building [Member] Maximum [Member] | May 25, 2014 Leasehold Improvements [Member] Minimum [Member] | May 25, 2014 Leasehold Improvements [Member] Maximum [Member] | May 25, 2014 Software Development [Member] Minimum [Member] | May 25, 2014 Software Development [Member] Maximum [Member] | May 25, 2014 Machinery and Equipment [Member] Depreciable Assets [Member] (Deprecated 2014-01-31) | May 25, 2014 Machinery and Equipment [Member] | Nov. 24, 2013 Machinery and Equipment [Member] | May 25, 2014 Ophthalmic [Member] HA-based Biomaterials [Member] Sales Revenue, Goods, Net [Member] Product Concentration Risk [Member] | May 25, 2014 Orthopedic [Member] HA-based Biomaterials [Member] Sales Revenue, Goods, Net [Member] Product Concentration Risk [Member] | Nov. 24, 2013 HA-based Biomaterials [Member] | May 25, 2014 HA-based Biomaterials [Member] | May 26, 2013 HA-based Biomaterials [Member] | May 27, 2012 HA-based Biomaterials [Member] | May 29, 2011 HA-based Biomaterials [Member] | May 25, 2014 Food Products Technology [Member] | May 26, 2013 Food Products Technology [Member] | May 27, 2012 Food Products Technology [Member] | May 29, 2011 Food Products Technology [Member] | May 25, 2014 Short Term [Member] | May 26, 2013 Short Term [Member] | May 25, 2014 Customer Relationships [Member] Minimum [Member] | May 25, 2014 Customer Relationships [Member] Maximum [Member] | May 25, 2014 Costco Wholesale Corporation [Member] Sales Revenue, Goods, Net [Member] Customer Concentration Risk [Member] | May 26, 2013 Costco Wholesale Corporation [Member] Sales Revenue, Goods, Net [Member] Customer Concentration Risk [Member] | May 25, 2014 Costco Wholesale Corporation [Member] Accounts Receivable [Member] Customer Concentration Risk [Member] | May 26, 2013 Costco Wholesale Corporation [Member] Accounts Receivable [Member] Customer Concentration Risk [Member] | May 25, 2014 Wal-mart, Inc. [Member] Sales Revenue, Goods, Net [Member] Customer Concentration Risk [Member] | May 26, 2013 Wal-mart, Inc. [Member] Sales Revenue, Goods, Net [Member] Customer Concentration Risk [Member] | May 25, 2014 Wal-mart, Inc. [Member] Accounts Receivable [Member] Customer Concentration Risk [Member] | May 26, 2013 Wal-mart, Inc. [Member] Accounts Receivable [Member] Customer Concentration Risk [Member] | May 25, 2014 International Customers [Member] Sales Revenue, Goods, Net [Member] Geographic Concentration Risk [Member] | May 26, 2013 International Customers [Member] Sales Revenue, Goods, Net [Member] Geographic Concentration Risk [Member] | May 25, 2014 Depreciable Assets [Member] (Deprecated 2014-01-31) | May 25, 2014 Sales Revenue, Goods, Net [Member] Customer Concentration Risk [Member] | May 26, 2013 Sales Revenue, Goods, Net [Member] Customer Concentration Risk [Member] | May 25, 2014 Apio Cooling, LP [Member] Apio, Inc [Member] | May 25, 2014 Fiscal 2013 [Member] | May 25, 2014 Fiscal 2012 [Member] | May 25, 2014 Minimum [Member] | May 25, 2014 Maximum [Member]
Note 1 - Organization, Basis of Presentation, and Summary of Significant Accounting Policies (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Proprietary Platforms | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners | 20.10% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 60.00% | 20.00% |  |  |  |  |  |  |  |  |  |  |  |  |  | 21.00% | 16.00% | 16.00% | 15.00% | 11.00% | 13.00% | 12.00% | 15.00% | 29.00% | 30.00% |  | 42.00% | 40.00% |  |  |  |  |
Investment Ownership Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 60.00% |  |  |  |
Number of Product Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Certificates of Deposit, at Carrying Value | $ 0 | $ 701,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Marketable Securities Contractual Maturity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 year | 2 years
Marketable Securities | 0 | 251,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 1,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Sale and Maturity of Marketable Securities | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Advertising Expense |  | 445,000 | 406,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 447,000
Revenue from Related Parties |  |  |  |  |  | 365,000 | 2,500,000 | 3,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Prior Period Reclassification Adjustment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,100,000 | 3,100,000 |  |
Accounts Receivable, Related Parties | 304,000 | 316,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Costs | 1,600,000 | 6,700,000 | 5,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts Payable, Related Parties | 134,000 | 225,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  |  |  |  |  |  |  |  | 35 years | 29 years | 3 years | 40 years | 3 years | 20 years | 3 years | 7 years |  | 11 years | 7 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capitalized Computer Software, Additions | 913,000 | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle Effect of Change on Depreciation Expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 876,000 |  |  |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 564,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Basic Earnings Per Share (in Dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.02 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12 years | 13 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill | 49,620,000 | 49,620,000 | 49,620,000 |  | 36,462,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 13,881,000 | 13,881,000 | 13,881,000 | 13,881,000 | 35,739,000 | 35,739,000 | 35,739,000 | 22,581,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value Assumptions, Expected Term |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 years |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Effective Income Tax Rate Reconciliation, Percent | 36.00% | 30.00% | 36.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 36.00% |  |  |  | 36.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of Estimated Fair Value Exceeds Net Book Value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 176.00% |  |  |  | 136.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Projected Cash Flow |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,300,000 |  |  |  | 10,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash, Period Increase (Decrease) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10,200,000 |  |  |  | 10,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Difference Between Projected Cash Flow and Actual Cash Flow |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cost-method Investments, Realized Losses |  |  |  | 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cost Method Investments | 793,000 | 793,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Revenue | 1,300,000 | 1,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity Attributable to Noncontrolling Interest | 1,692,000 | 1,721,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Tax Assets, Valuation Allowance | $ 881,000 | $ 783,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares) | 333,993 | 88,022 | 1,855,167 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price (in Dollars per share) | $ 14.15 | $ 12.80 | $ 6.72 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share) | $ 4.41 | $ 3.57 | $ 2.65 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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