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Note 5 - Intangible Assets (Details Textual) - USD ($) |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 01, 2017 | May 27, 2018 | May 28, 2017 | May 29, 2016
Goodwill, Ending Balance |  | $ 54,510,000 | $ 54,510,000 |
Finite-Lived Intangible Assets, Amortization Expense, Year Two |  | 949,000 |  |
Goodwill, Impaired, Accumulated Impairment Loss |  | 38,800,000 |  |
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months |  | 949,000 |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Three |  | 949,000 |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Four |  | 949,000 |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Five |  | 949,000 |  |
Lifecore [Member] |  |  |  |
Finite-Lived Customer Relationships, Gross |  | 3,700,000 |  |
Apio [Member] |  |  |  |
Finite-Lived Customer Relationships, Gross |  | 7,500,000 |  |
O Olive & Vinegar [Member] |  |  |  |
Goodwill, Ending Balance | $ 5,200,000 |  |  |
Finite-Lived Customer Relationships, Gross |  | 700,000 |  |
Finite-Lived Intangible Asset, Useful Life | 11 years |  |  |
Trade Names [Member] |  |  |  |
Finite-Lived Intangible Assets, Accumulated Amortization |  | 872,000 | 872,000 |
Customer Relationships [Member] |  |  |  |
Finite-Lived Intangible Assets, Accumulated Amortization |  | $ 6,100,000 | 5,100,000 |
Customer Relationships [Member] | Lifecore [Member] |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  | 12 years |  |
Customer Relationships [Member] | Apio [Member] |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  | 13 years |  |
Customer Relationships [Member] | O Olive & Vinegar [Member] |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  | 11 years |  |
Food Export [Member] |  |  |  |
Goodwill, Ending Balance |  | $ 35,400,000 | 35,400,000 | $ 35,400,000
Biomaterials [Member] |  |  |  |
Goodwill, Ending Balance |  | 13,900,000 | 13,900,000 | 13,900,000
Other Segments [Member] |  |  |  |
Goodwill, Ending Balance |  | $ 5,200,000 | $ 5,200,000 | $ 5,200,000

X
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