Note 4 - Intangible Assets (Details Textual) - USD ($)	12 Months Ended
	May 29, 2016	May 31, 2016	May 31, 2015	May 25, 2014
Food Products Technology [Member]
Goodwill	$ 35,700,000		$ 35,700,000	$ 35,700,000
HA Based Biomaterials [Member]
Goodwill		$ 13,900,000	13,900,000	$ 13,900,000
Trade Names [Member]
Finite-Lived Intangible Assets, Accumulated Amortization	$ 872,000		872,000
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]
Finite-Lived Intangible Assets, Accumulated Amortization	$ 4,200,000		3,400,000
Lifecore [Member]
Finite-Lived Customer Relationships, Gross	3,700,000
Apio [Member]
Finite-Lived Customer Relationships, Gross	7,500,000
Goodwill	49,620,000		49,620,000
Finite-Lived Intangible Assets, Amortization Expense, Year Two	885,000
Finite-Lived Intangible Assets, Amortization Expense, Year Three	885,000
Finite-Lived Intangible Assets, Amortization Expense, Year Four	885,000
Finite-Lived Intangible Assets, Amortization Expense, Year Five	885,000
Goodwill, Impaired, Accumulated Impairment Loss	38,800,000		$ 4,800,000
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	$ 885,000