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Investment in Non-public Company (Details) - USD ($) |  |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | --- | ---
Jul. 15, 2014 | Feb. 15, 2011 | Nov. 29, 2020 | Nov. 24, 2019 | Nov. 29, 2020 | Nov. 24, 2019
Dividend income |  |  | $ 281,000 | $ 281,000 | $ 563,000 | $ 562,000
Senior A Preferred Stock |  |  |  |  |  |
Dividend percentage rate | 7.50% |  |  |  |  |
Windset |  |  |  |  |  |
Investment ownership percentage | 26.90% |  | 26.90% |  | 26.90% |
Dividend income |  |  | $ 300,000 | 300,000 | $ 600,000 | 600,000
Windset | Other Income |  |  |  |  |  |
Change in market value of company's investment |  |  | (11,800,000) | $ 200,000 | (11,800,000) | $ 200,000
Curation Foods | Windset |  |  |  |  |  |
Payments to acquire investments | $ 11,000,000.0 |  |  |  |  |
Time frame to be paid after anniversary | 90 days |  |  |  |  |
Liquidation value of preferred shares |  |  | 20,100,000 |  | 20,100,000 |
Curation Foods | Windset | Junior Preferred Shares |  |  |  |  |  |
Preferred stock investment, dividends declared |  |  | 0 |  | 0 |
Liquidation value of preferred shares |  |  | 5,100,000 |  | 5,100,000 |
Curation Foods | Windset | Senior A Preferred Stock |  |  |  |  |  |
Liquidation value of preferred shares |  |  | $ 15,000,000.0 |  | $ 15,000,000.0 |
Curation Foods | Windset | Senior A Preferred Stock |  |  |  |  |  |
Investment In non-public company shares (in shares) |  | 150,000 |  |  |  |
Payments to acquire investments |  | $ 15,000,000.0 |  |  |  |
Curation Foods | Windset | Common Stock |  |  |  |  |  |
Investment In non-public company shares (in shares) | 68 | 201 |  |  |  |
Payments to acquire investments |  | $ 201,000 |  |  |  |
Curation Foods | Windset | Junior Preferred Shares |  |  |  |  |  |
Investment In non-public company shares (in shares) | 51,211 |  |  |  |  |

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