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Note 1 - Organization, Basis of Presentation and Summary of Significant Accounting Policies (Detail) (USD $)	3 Months Ended	9 Months Ended
	Feb. 26, 2012	Feb. 24, 2013	Feb. 26, 2012	May 27, 2012
Number of Proprietary Platforms		2
Certificates of Deposit, at Carrying Value (in Dollars)		$ 1,700,000		$ 0
Marketable Securities Contractual Maturity		1 year
Marketable Securities (in Dollars)		251,000		0
Proceeds from Sale and Maturity of Marketable Securities (in Dollars)	9,100,000		9,100,000
Subsidiary or Equity Method Investee, Cumulative Percentage Ownership after All Transactions		20.10%
Short Term [Member]
Marketable Securities (in Dollars)		$ 3,500,000		$ 0
Minimum [Member]
Marketable Securities Contractual Maturity		1 year
Finite-Lived Intangible Asset, Useful Life		12 years
Maximum [Member]
Marketable Securities Contractual Maturity		2 years
Finite-Lived Intangible Asset, Useful Life		13 years

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 1

-Article 5



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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash Equivalents

-URI http://asc.fasb.org/extlink&oid=6507016



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 8, 9

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 4: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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-Name Accounting Standards Codification

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-URI http://asc.fasb.org/extlink&oid=6516133



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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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