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Note 4 - Investments in non-public companies (Detail) (USD $)	1 Months Ended	3 Months Ended		6 Months Ended							1 Months Ended			0 Months Ended	3 Months Ended
	May 31, 2012	Nov. 25, 2012	Nov. 27, 2011	Nov. 25, 2012	Nov. 27, 2011	Nov. 27, 2011	May 27, 2012	Feb. 15, 2011 Preferred Stock [Member] Windset [Member]	Feb. 15, 2011 Common Stock [Member] Windset [Member] Apio [Member]	Feb. 15, 2011 Common Stock [Member] Windset [Member]	May 30, 2010 Aesthetic Sciences [Member]	Nov. 25, 2012 Aesthetic Sciences [Member]	Jul. 16, 2010 Aesthetic Sciences [Member]	Feb. 15, 2011 Windset [Member]	Nov. 27, 2011 Windset [Member]
Long-term Investments												$ 793,000	$ 1,800,000
Other than Temporary Impairment Losses, Investments											1,000,000
Investments in and Advances to Affiliates, Balance, Shares (in Shares)								150,000	201					0.201
Cost Method Investments		793,000		793,000			793,000			15,000,000
Preferred Stock, Dividend Rate, Percentage														7.50%
Dividends and Interest Paid	1,100,000
Investment Income, Dividend		281,000	281,000	563,000	563,000	563,000
Change in Market Value Of Investment in Company		$ 1,000,000		$ 5,300,000		$ 1,200,000									$ 1,100,000

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Change in Market Value Of Investment in Company

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This item represents the aggregate carrying amount of all cost-method investments as reported on or included in the balance sheet. The original cost of the investments may differ from the aggregate carrying amount disclosed due to various adjustments such as: (i) dividends received in excess of earnings after the date of investment that are considered a return of investment and therefore recorded as reductions to cost of the investment, or (ii) a series of operating losses of an investee or other factors which may indicate that a decrease in value of the investment has occurred which is other than temporary and accordingly such decrease in value has been recognized.

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The contractual amount of dividends (or interest on participating income bonds) that must be paid for the current period (for example, unpaid cumulative dividends).

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The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

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Income derived from investments in equity securities representing a distribution of earnings to shareholders by the investee companies.

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Balance held at close of period in number of shares.

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The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle).

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