Note 14 - Business Segment Reporting (Details)	3 Months Ended
	Aug. 25, 2013	Aug. 26, 2012
Note 14 - Business Segment Reporting (Details) [Line Items]
Number of Operating Segments	3
Entity-Wide Revenue Major Customer Number	5	5
Entity-Wide Revenue Top Customers Percentage	44.00%	36.00%
Customer 1 [Member] | Food Products Technology [Member]
Note 14 - Business Segment Reporting (Details) [Line Items]
Entity-Wide Revenue Top Customers Percentage	20.00%	12.00%
Customer 2 [Member] | Food Products Technology [Member]
Note 14 - Business Segment Reporting (Details) [Line Items]
Entity-Wide Revenue Top Customers Percentage	12.00%	12.00%
Food Products Technology [Member]
Note 14 - Business Segment Reporting (Details) [Line Items]
Entity-Wide Revenue Major Customer Number	2	2