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Goodwill and Intangible Assets - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2020	May 26, 2019	May 27, 2018
Indefinite-lived Intangible Assets [Line Items]
Goodwill impairment loss	$ 7,860	$ 0
Goodwill	69,386	76,742	$ 54,510
Amortization expense related to finite-lived intangible assets	2,000	1,500	$ 1,000
Amortization expense, next year	1,800
Amortization expense, year two	1,800
Amortization expense, year three	1,800
Amortization expense, year four	1,800
Amortization expense, year five	1,800
O Olive & Vinegar
Indefinite-lived Intangible Assets [Line Items]
Goodwill impairment loss	5,200
Yucatan Foods, LP
Indefinite-lived Intangible Assets [Line Items]
Goodwill impairment loss	2,700
Trademarks/tradenames
Indefinite-lived Intangible Assets [Line Items]
Impairment of intangible assets	872	$ 872
Trademarks/tradenames \| O Olive & Vinegar
Indefinite-lived Intangible Assets [Line Items]
Impairment of intangible assets	1,100
Trademarks/tradenames \| Yucatan Foods, LP
Indefinite-lived Intangible Assets [Line Items]
Impairment of intangible assets	3,500
Customer relationships \| O Olive & Vinegar
Indefinite-lived Intangible Assets [Line Items]
Impairment of intangible assets	500
Lifecore
Indefinite-lived Intangible Assets [Line Items]
Goodwill	13,900
Eat Smart
Indefinite-lived Intangible Assets [Line Items]
Goodwill	35,500
Yucatan Foods, LP
Indefinite-lived Intangible Assets [Line Items]
Goodwill impairment loss	2,700
Goodwill	20,000
O Olive & Vinegar
Indefinite-lived Intangible Assets [Line Items]
Goodwill impairment loss	$ 5,200