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Note 14 - Business Segment Reporting (Detail) - Sales by Geograhic Area (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Feb. 24, 2013	Feb. 26, 2012	Feb. 24, 2013	Feb. 26, 2012
Segment sales	$ 117,867	$ 80,064	$ 334,595	$ 234,935
Taiwan [Member]
Segment sales	2,900	2,000	28,700	20,900
Canada [Member]
Segment sales	7,400	5,400	19,700	15,200
Indonesia [Member]
Segment sales	4,100	5,400	17,600	19,300
Belgium [Member]
Segment sales	10,600	6,000	15,200	14,100
Japan [Member]
Segment sales	1,500	1,600	7,400	7,800
All Other Countries [Member]
Segment sales	$ 7,800	$ 4,500	$ 20,200	$ 14,500

X

- Definition

Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains.

+ 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=6880815&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

+ Details

Name:	us-gaap_Revenues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration