Investment in Non-public Company (Details) - USD ($)			3 Months Ended		9 Months Ended
	Jul. 15, 2014	Feb. 15, 2011	Feb. 23, 2020	Feb. 24, 2019	Feb. 23, 2020	Feb. 24, 2019
Dividend income			$ 281,000	$ 413,000	$ 843,000	$ 1,238,000
Senior A Preferred Stock
Dividend percentage rate	7.50%
Windset
Investment ownership percentage	26.90%		26.90%		26.90%
Dividend income			$ 300,000	400,000	$ 800,000	1,200,000
Windset | Other Income
Change in market value of company's investment			0.0	$ 0.0	200,000	$ 1,600,000
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