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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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- Definition A savings certificate entitling the Entity (that is, bearer) to receive interest at an established maturity date, based upon a fixed interest rate. A certificate of deposit may be issued in any denomination. Certificates of deposit are generally issued by commercial banks and, therefore, insured by the FDIC (up to the prescribed limit). Certificates of deposit generally restrict holders from withdrawing funds on demand without the incurrence of penalties. Generally, only certificates of deposit with original maturities of three months or less qualify as cash equivalents. Original maturity means original maturity to the entity holding the investment. As a related example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months. + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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