Business Segment Reporting - Operations by Business Segment (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	May 30, 2021	Feb. 28, 2021	Nov. 29, 2020	Aug. 30, 2020	May 31, 2020	Feb. 23, 2020	Nov. 24, 2019	Aug. 25, 2019	May 30, 2021	May 31, 2020	May 26, 2019
Segment Reporting Information [Line Items]
Product sales	$ 139,832	$ 137,782	$ 130,904	$ 135,643	$ 156,131	$ 152,928	$ 142,593	$ 138,714	$ 544,161	$ 590,366	$ 557,559
Gross profit	24,801	19,689	20,637	16,347	24,091	20,047	15,514	15,336	81,474	74,988	81,003
Net income (loss) from continuing operations	(2,866)	$ (5,498)	$ (13,301)	$ (11,000)	(15,149)	$ (11,518)	$ (6,740)	$ (4,784)	(32,665)	(38,191)	2,122
Identifiable assets	502,924				541,313				502,924	541,313	519,091
Depreciation and amortization									18,008	18,344	15,230
Capital expenditures									23,769	26,686	44,734
Dividend income									1,125	1,125	1,650
Interest income									48	103	145
Interest expense, net									(15,344)	(9,603)	(5,230)
Income tax (benefit) expense									(7,801)	(13,116)	1,518
Corporate overhead allocation									0	0	0
Curation Foods
Segment Reporting Information [Line Items]
Product sales									446,074	504,533	481,686
Gross profit									43,209	42,105	49,305
Net income (loss) from continuing operations									(28,241)	(39,088)	(6,229)
Identifiable assets	197,660				249,217				197,660	249,217	367,352
Depreciation and amortization									12,410	13,240	10,360
Capital expenditures									7,547	15,944	30,583
Dividend income									1,125	1,125	1,650
Interest income									0	37	112
Interest expense, net									(5,502)	(5,504)	(3,278)
Income tax (benefit) expense									(8,918)	(13,028)	(1,373)
Corporate overhead allocation									5,734	5,908	5,837
Lifecore
Segment Reporting Information [Line Items]
Product sales									98,087	85,833	75,873
Gross profit									38,265	32,883	31,698
Net income (loss) from continuing operations									14,461	11,749	12,070
Identifiable assets	185,417				165,461				185,417	165,461	145,558
Depreciation and amortization									5,502	5,008	4,140
Capital expenditures									16,222	10,612	12,965
Dividend income									0	0	0
Interest income									0	0	0
Interest expense, net									0	0	0
Income tax (benefit) expense									4,568	3,346	4,024
Corporate overhead allocation									4,773	4,190	3,901
Other
Segment Reporting Information [Line Items]
Product sales									0	0	0
Gross profit									0	0	0
Net income (loss) from continuing operations									(18,885)	(10,852)	(3,719)
Identifiable assets	$ 119,847				$ 126,635				119,847	126,635	6,181
Depreciation and amortization									96	96	730
Capital expenditures									0	130	1,186
Dividend income									0	0	0
Interest income									48	66	33
Interest expense, net									(9,842)	(4,099)	(1,952)
Income tax (benefit) expense									(3,451)	(3,434)	(1,133)
Corporate overhead allocation									$ (10,507)	$ (10,098)	$ (9,738)