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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