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Note 2 - Investments in Non-public Companies (Details Textual) - USD ($) |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Mar. 01, 2015 | Jul. 15, 2014 | Oct. 29, 2014 | Feb. 15, 2011 | May. 31, 2015 | May. 25, 2014 | May. 26, 2013
Aesthetic Sciences [Member] | Other Comprehensive Income (Loss) [Member] |  |  |  |  |  |  |
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net |  |  |  |  | $ 793,000 |  |
Aesthetic Sciences [Member] |  |  |  |  |  |  |
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net | $ 793,000 |  |  |  |  |  |
Windset [Member] | Senior A Preferred Stock [Member] | Apio [Member] |  |  |  |  |  |  |
Investment In Non Public Company Shares |  |  |  | 150,000 |  |  |
Payments to Acquire Investments |  |  |  | $ 15,000,000 |  |  |
Preferred Stock, Liquidation Preference, Value |  |  |  |  | 15,000,000 |  |
Windset [Member] | Common Stock [Member] | Apio [Member] |  |  |  |  |  |  |
Investment In Non Public Company Shares |  | 68 |  | 201 |  |  |
Payments to Acquire Investments |  |  |  | $ 201 |  |  |
Windset [Member] | Junior Preferred Shares [Member] | Apio [Member] |  |  |  |  |  |  |
Investment In Non Public Company Shares |  | 51,211 |  |  |  |  |
Preferred Stock, Liquidation Preference, Value |  |  |  |  | 5,100,000 |  |
Windset [Member] | Senior B Preferred Stock [Member] | Apio [Member] | First Anniversary [Member] |  |  |  |  |  |  |
Investments, Value of Shares with Put Option |  |  | $ 1,500,000 |  |  |  |
Windset [Member] | Senior B Preferred Stock [Member] | Apio [Member] | Second Anniversary [Member] |  |  |  |  |  |  |
Investments, Value of Shares with Put Option |  |  | 2,750,000 |  |  |  |
Windset [Member] | Senior B Preferred Stock [Member] | Apio [Member] | Third Anniversary [Member] |  |  |  |  |  |  |
Investments, Value of Shares with Put Option |  |  | $ 2,750,000 |  |  |  |
Windset [Member] | Senior B Preferred Stock [Member] | Apio [Member] |  |  |  |  |  |  |
Investment In Non Public Company Shares |  |  | 70,000 |  |  |  |
Preferred Stock, Dividend Rate, Percentage |  |  | 7.50% |  |  |  |
Payments to Increase Investment In Non Public Company |  |  | $ 7,000,000 |  |  |  |
Windset [Member] | Apio [Member] |  |  |  |  |  |  |
Payments to Acquire Investments |  | $ 11,000,000 |  |  |  |  |
Preferred Stock, Liquidation Preference, Value |  |  |  |  | 20,100,000 |  |
Windset [Member] | Other Income [Member] |  |  |  |  |  |  |
Gain (Loss) on Investments |  |  |  |  | $ 3,900,000 | $ 10,000,000 | $ 8,100,000
Windset [Member] |  |  |  |  |  |  |
Investment Ownership Percentage |  | 26.90% |  |  |  |  |
Preferred Stock, Dividend Rate, Percentage |  |  |  |  | 7.50% |  |
Investment Income, Dividend |  |  |  |  | $ 1,400,000 | $ 1,100,000 | $ 1,100,000
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net |  |  |  |  | 793,000 |  |
Payments to Acquire Investments |  |  |  |  | 18,000,000 |  |
Investment Income, Dividend |  |  |  |  | $ 1,417,000 | $ 1,125,000 | $ 1,125,000

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- Definition This item represents the net total realized and unrealized gain (loss) included in earnings for the period as a result of selling or holding marketable securities categorized as trading, available-for-sale, or held-to-maturity, including the unrealized holding gain (loss) of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period. Additionally, this item would include any gains (losses) realized during the period from the sale of investments accounted for under the cost method of accounting and losses recognized for other than temporary impairments (OTTI) of the subject investments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (c)-(e) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.7(c),9(a)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27405-111563 + Details
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- Definition The cash outflow associated with the purchase of all investments (debt, security, other) during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3213-108585 + Details
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