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Note 3 - Investment in Non-public Company (Details Textual) - USD ($) |  | 1 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | --- | ---
Jul. 15, 2014 | Jul. 15, 2014 | Oct. 29, 2014 | Feb. 15, 2011 | Nov. 26, 2017 | Nov. 27, 2016 | Nov. 26, 2017 | Nov. 27, 2016
Investment Income, Dividend |  |  |  |  | $ 412,000 | $ 412,000 | $ 825,000 | $ 825,000
Senior A Preferred Stock [Member] |  |  |  |  |  |  |  |
Preferred Stock, Dividend Rate, Percentage |  | 7.50% |  |  |  |  |  |
Windset [Member] |  |  |  |  |  |  |  |
Investment Ownership Percentage | 26.90% | 26.90% |  |  | 26.90% |  | 26.90% |
Investment Income, Dividend |  |  |  |  | $ 412,000 | $ 412,000 | $ 825,000 | 825,000
Windset [Member] | Other Income [Member] |  |  |  |  |  |  |  |
Change In Market Value Of Investment In Company |  |  |  |  |  |  | 2,200,000 | $ 0
Windset [Member] | Apio [Member] |  |  |  |  |  |  |  |
Payments to Acquire Investments | $ 11,000,000 |  |  |  |  |  |  |
Dividends on Investment, Timeframe to Be Paid After Anniversary |  | 90 days |  |  |  |  |  |
Investment, Preferred Stock, Liquidation Preference, Value |  |  |  |  | 20,100,000 |  | 20,100,000 |
Windset [Member] | Apio [Member] | Senior A Preferred Stock [Member] |  |  |  |  |  |  |  |
Investment In Non Public Company Shares |  |  |  | 150,000 |  |  |  |
Payments to Acquire Investments |  |  |  | $ 15,000,000 |  |  |  |
Investment, Preferred Stock, Liquidation Preference, Value |  |  |  |  | 15,000,000 |  | 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 |  |  |  |  |  |
Investment, Preferred Stock, Dividends Declared |  |  |  |  | 0 |  | 0 |
Investment, Preferred Stock, Liquidation Preference, Value |  |  |  |  | $ 5,100,000 |  | $ 5,100,000 |
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] | 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 |  |  |  |  |

X
- Definition Change during the period in the market value of an investment in the company. + References No definition available. + Details
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- Definition The timeframe in which the dividends are to be paid after each anniversary of the execution of the Windset Purchase Agreement. + References No definition available. + Details
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- Definition The amount of shares in an Investment in a non-public company. + References No definition available. + Details
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- Definition Amount of dividend income on nonoperating securities. + References Reference 1: 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(a)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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