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Note 1 - Organization, Basis of Presentation and Summary of Significant Accounting Policies (Detail) (USD $)	3 Months Ended
	Aug. 26, 2012	May 27, 2012
Number of Proprietary Platforms	2
Marketable Securities Contractual Maturity	1 year
Marketable Securities (in Dollars)	$ 756,000	$ 0
Other than Temporary Impairment Losses, Investments (in Dollars)	1,000,000
Cost Method Investments (in Dollars)	$ 793,000	$ 793,000
Subsidiary or Equity Method Investee, Cumulative Percentage Ownership after All Transactions	20.10%
Minimum [Member]
Finite-Lived Intangible Asset, Useful Life	12 years
Maximum [Member]
Finite-Lived Intangible Asset, Useful Life	13 years

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