Note 11 - Business Segment Reporting (Details Textual)	6 Months Ended
	Nov. 27, 2016	Nov. 29, 2015
Number of Operating Segments	3
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Packaged Fresh Vegetables [Member]
Entity Wide Revenue Major Customer Number	2
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Top Five Customers [Member]
Concentration Risk, Percentage	44.00%	45.00%
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Costco [Member] | Packaged Fresh Vegetables [Member]
Concentration Risk, Percentage	17.00%	19.00%
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Wal-mart [Member] | Packaged Fresh Vegetables [Member]
Concentration Risk, Percentage	13.00%	11.00%