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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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