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Note 14 - Business Segment Reporting (Details) - Sales by Geograhic Area (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Nov. 24, 2013
Nov. 25, 2012
Nov. 24, 2013
Nov. 25, 2012
Note 14 - Business Segment Reporting (Details) - Sales by Geograhic Area [Line Items]        
Segment sales $ 120,026 $ 114,654 $ 229,505 $ 216,728
Taiwan [Member]
       
Note 14 - Business Segment Reporting (Details) - Sales by Geograhic Area [Line Items]        
Segment sales 12,600 12,900 24,600 25,800
Canada [Member]
       
Note 14 - Business Segment Reporting (Details) - Sales by Geograhic Area [Line Items]        
Segment sales 10,200 6,100 19,600 12,300
China [Member]
       
Note 14 - Business Segment Reporting (Details) - Sales by Geograhic Area [Line Items]        
Segment sales 3,700 2,800 5,300 3,700
Indonesia [Member]
       
Note 14 - Business Segment Reporting (Details) - Sales by Geograhic Area [Line Items]        
Segment sales 2,400 7,400 4,900 13,500
Japan [Member]
       
Note 14 - Business Segment Reporting (Details) - Sales by Geograhic Area [Line Items]        
Segment sales 2,100 2,800 5,300 5,900
Belgium [Member]
       
Note 14 - Business Segment Reporting (Details) - Sales by Geograhic Area [Line Items]        
Segment sales 800 1,600 2,000 4,600
All Other Countries [Member]
       
Note 14 - Business Segment Reporting (Details) - Sales by Geograhic Area [Line Items]        
Segment sales $ 4,900 $ 4,600 $ 10,200 $ 8,800