Note 12 - Business Segment Reporting (Details Textual) - Sales Revenue, Net [Member] - Customer Concentration Risk [Member]	9 Months Ended
Feb. 28, 2016	Mar. 01, 2015	Mar. 01, 2015
Packaged Fresh Vegetables [Member] \| Costco [Member]
Concentration Risk, Percentage	20.00%		12.00%
Packaged Fresh Vegetables [Member] \| Wal-mart [Member]
Concentration Risk, Percentage	21.00%	11.00%
Packaged Fresh Vegetables [Member]
Entity Wide Revenue Major Customer Number	2		2
Top Five Customers [Member]
Concentration Risk, Percentage	45.00%	45.00%
Entity Wide Revenue Major Customer Number	5	5

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13531-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6404-108592

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13537-108611

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