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Note 2 - Investments in Non-public Company (Details Textual) - USD ($) |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Mar. 01, 2015 | Jul. 15, 2014 | Jul. 15, 2014 | Oct. 29, 2014 | Feb. 15, 2011 | May 29, 2016 | May 31, 2015 | May 25, 2014
Other Comprehensive Income (Loss) [Member] | Aesthetic Sciences [Member] |  |  |  |  |  |  |  |
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net | $ 793,000 |  |  |  |  |  |  |
Windset [Member] | Apio [Member] | Senior A Preferred Stock [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] | Apio [Member] | Common Stock [Member] |  |  |  |  |  |  |  |
Investment In Non Public Company Shares |  | 68 | 68 |  | 201 |  |  |
Payments to Acquire Investments |  |  |  |  | $ 201 |  |  |
Windset [Member] | Apio [Member] | Junior Preferred Shares [Member] |  |  |  |  |  |  |  |
Investment In Non Public Company Shares |  | 51,211 | 51,211 |  |  |  |  |
Preferred Stock, Liquidation Preference, Value |  |  |  |  |  | 5,100,000 |  |
Windset [Member] | Apio [Member] | Senior B Preferred Stock [Member] | First Anniversary [Member] |  |  |  |  |  |  |  |
Investments, Value of Shares with Put Option |  |  |  | $ 1,500,000 |  |  |  |
Windset [Member] | Apio [Member] | Senior B Preferred Stock [Member] | Second Anniversary [Member] |  |  |  |  |  |  |  |
Investments, Value of Shares with Put Option |  |  |  | 2,750,000 |  |  |  |
Windset [Member] | Apio [Member] | Senior B Preferred Stock [Member] | Third Anniversary [Member] |  |  |  |  |  |  |  |
Investments, Value of Shares with Put Option |  |  |  | $ 2,750,000 |  |  |  |
Windset [Member] | Apio [Member] | Senior B Preferred Stock [Member] |  |  |  |  |  |  |  |
Investment In Non Public Company Shares |  |  |  | 70,000 |  |  |  |
Payments to Acquire Investments |  |  |  | $ 7,000,000 |  |  |  |
Preferred Stock, Dividend Rate, Percentage |  |  |  | 7.50% |  |  |  |
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 |  |  |  |  |  | $ 1,200,000 | $ 3,900,000 | $ 10,000,000
Windset [Member] |  |  |  |  |  |  |  |
Investment Ownership Percentage |  | 26.90% | 26.90% |  |  | 26.90% | 26.90% |
Investment Income, Dividend |  |  |  |  |  | $ 1,700,000 | $ 1,400,000 | 1,100,000
Senior A Preferred Stock [Member] |  |  |  |  |  |  |  |
Preferred Stock, Dividend Rate, Percentage |  |  | 7.50% |  |  |  |  |
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net |  |  |  |  |  |  | 793,000 |
Payments to Acquire Investments |  |  |  |  |  |  | 18,000,000 |
Investment Income, Dividend |  |  |  |  |  | $ 1,650,000 | $ 1,417,000 | $ 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=73527792&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=66902209&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=63488584&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=73527792&loc=d3e27405-111563 + Details
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