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Note 10 - Business Segment Reporting - Sales by Geographic Area (Details) - USD ($) $ in Millions | 3 Months Ended
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Aug. 28, 2016 | Aug. 30, 2015
CANADA |  |
Segment sales | $ 17.8 | $ 20.7
TAIWAN, PROVINCE OF CHINA |  |
Segment sales | 13.7 | 13.0
BELGIUM |  |
Segment sales | 5.3 | 0.8
CHINA |  |
Segment sales | 5.2 | 4.0
JAPAN |  |
Segment sales | 2.0 | 2.0
INDONESIA |  |
Segment sales | 1.5 | 1.5
All Other Countries [Member] |  |
Segment sales | $ 2.7 | $ 4.3

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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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