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Note 2 - Investments in Non-public Companies (Details) (USD $)	3 Months Ended			0 Months Ended			0 Months Ended			0 Months Ended					0 Months Ended	1 Months Ended		1 Months Ended				0 Months Ended	3 Months Ended
	Aug. 31, 2014	Aug. 25, 2013	Jul. 15, 2014 Preferred Stock [Member] Apio, Inc [Member] Windset [Member]	Feb. 15, 2011 Preferred Stock [Member] Windset [Member]	Jul. 15, 2014 Preferred Stock [Member] Windset [Member]	Feb. 15, 2011 Preferred Stock [Member] Windset [Member]	Feb. 15, 2011 Common Stock [Member] Apio, Inc [Member] Windset [Member]	Jul. 15, 2014 Common Stock [Member] Apio, Inc [Member] Windset [Member]	Feb. 15, 2011 Common Stock [Member] Apio, Inc [Member] Windset [Member]	Feb. 15, 2011 Common Stock [Member] Windset [Member]	Jul. 15, 2014 Common Stock [Member] Windset [Member]	Feb. 15, 2011 Common Stock [Member] Windset [Member]	Aug. 31, 2014 Senior Preferred Shares [Member] Apio, Inc [Member] Windset [Member]	Aug. 31, 2014 Junior Preferred Shares [Member] Apio, Inc [Member] Windset [Member]	Jul. 15, 2014 Apio, Inc [Member] Windset [Member]	Jun. 30, 2010 Apio, Inc [Member] Windset [Member]	Aug. 31, 2014 Apio, Inc [Member] Windset [Member]	May 30, 2010 Aesthetic Sciences [Member]	Aug. 31, 2014 Aesthetic Sciences [Member]	May 25, 2014 Aesthetic Sciences [Member]	Jul. 16, 2010 Aesthetic Sciences [Member]	Feb. 15, 2011 Windset [Member]	Aug. 31, 2014 Windset [Member]	Aug. 25, 2013 Windset [Member]	Jul. 15, 2014 Windset [Member]
Note 2 - Investments in Non-public Companies (Details) [Line Items]
Long-term Investments																			$ 793,000	$ 793,000	$ 1,800,000
Other than Temporary Impairment Losses, Investments																		1,000,000
Investment in Non-Public Company Shares (in Shares)			15,857		15,857	150,000		68	201		68	201
Payments to Acquire Investments	11,000,000			15,000,000			201			201					11,000,000
Investment Ownership Percentage																							26.90%		26.90%
Preferred Stock, Dividend Rate, Percentage																						7.50%
Preferred Stock, Liquidation Preference, Value													15,000,000	5,100,000			20,100,000
Investment Income, Dividend	281,000	281,000																					281,000	281,000
Change in Market Value of Investment																							200,000	5,400,000
Development Fee																100,000
Annual License Fee Percentage																3.00%
Annual Minimum License Fees																$ 150,000

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Annual license fees as a percentage of net revenue.

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