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Note 1 - Organization, Basis of Presentation and Summary of Significant Accounting Policies (Details Textual) - USD ($) |  | 1 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jul. 15, 2014 | Oct. 29, 2014 | Feb. 15, 2011 | Nov. 30, 2014 | Feb. 28, 2016 | Mar. 01, 2015 | May. 31, 2015 | Nov. 29, 2015 | Jul. 25, 2013
Customer Relationships [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  |  |  | 12 years |  |  |  |
Customer Relationships [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  |  |  | 13 years |  |  |  |
Apio [Member] | Windset [Member] | Senior B Preferred Stock [Member] |  |  |  |  |  |  |  |  |
Investment In Non Public Company Shares |  | 70,000 | 150,000 |  |  |  |  |  |
Payments to Acquire Investments | $ 11,000,000 | $ 7,000,000 | $ 15,000,000 |  |  |  |  |  |
Apio [Member] | Windset [Member] | Junior Preferred Shares [Member] |  |  |  |  |  |  |  |  |
Investment In Non Public Company Shares | 51,211 |  |  |  |  |  |  |  |
Apio [Member] | Windset [Member] | Common Stock [Member] |  |  |  |  |  |  |  |  |
Investment In Non Public Company Shares | 68 |  | 201 |  |  |  |  |  |
Payments to Acquire Investments |  |  | $ 201 |  |  |  |  |  |
Apio [Member] | Windset [Member] |  |  |  |  |  |  |  |  |
Payments to Acquire Investments | $ 11,000,000 |  |  |  |  |  |  |  |
Investment Ownership Percentage |  |  |  |  |  |  |  | 60.00% |
Windset [Member] |  |  |  |  |  |  |  |  |
Investment Ownership Percentage | 26.90% |  |  |  | 26.90% |  |  |  |
Investments, Fair Value Disclosure |  |  |  |  | $ 62,500,000 |  | $ 61,500,000 |  |
Bonus Under Long-term Incentive Plan [Member] | Landec Long-Term Incentive Plan [Member] |  |  |  |  |  |  |  |  |
Employee-related Liabilities |  |  |  |  |  |  |  |  | $ 2,000,000
Decrease in Selling, General and Administrative Expenses |  |  |  | $ 677,000 |  |  |  |  |
Landec Long-Term Incentive Plan [Member] |  |  |  |  |  |  |  |  |
Long-term Incentive Plan, Term |  |  |  | 3 years |  |  |  |  |
Sales Revenue, Goods, Net [Member] | Product Concentration Risk [Member] | Ophthalmic [Member] | HA Based Biomaterials [Member] |  |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  |  |  | 60.00% |  |
Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member] | Orthopedic [Member] | HA Based Biomaterials [Member] |  |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  |  |  | 20.00% |  |
Number of Proprietary Platforms |  |  |  |  |  |  |  | 2 |
Payments to Acquire Investments |  |  |  |  |  | $ 18,000,000 |  |  |

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