Business Segment Reporting - Operations by Business Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Aug. 30, 2020	Aug. 25, 2019
Segment Reporting Information [Line Items]
Net sales	$ 135,643	$ 138,714
Gross profit	16,347	15,336
Net (loss) income	(11,000)	(4,784)
Depreciation and amortization	4,748	4,413
Dividend income	281	281
Interest income	8	25
Interest expense	3,109	2,075
Income tax (benefit) expense	(4,309)	(1,365)
Corporate overhead allocation	0	0
Curation Foods
Segment Reporting Information [Line Items]
Net sales	113,839	126,673
Gross profit	11,345	12,822
Net (loss) income	(8,271)	(2,171)
Depreciation and amortization	3,410	3,205
Dividend income	281	281
Interest income	0	20
Interest expense	1,376	1,376
Income tax (benefit) expense	(2,612)	(586)
Corporate overhead allocation	1,856	1,696
Lifecore
Segment Reporting Information [Line Items]
Net sales	21,804	12,041
Gross profit	5,002	2,514
Net (loss) income	112	(1,395)
Depreciation and amortization	1,310	1,185
Dividend income	0	0
Interest income	0	0
Interest expense	0	0
Income tax (benefit) expense	35	(465)
Corporate overhead allocation	1,403	976
Other
Segment Reporting Information [Line Items]
Net sales	0	0
Gross profit	0	0
Net (loss) income	(2,841)	(1,218)
Depreciation and amortization	28	23
Dividend income	0	0
Interest income	8	5
Interest expense	1,733	699
Income tax (benefit) expense	(1,732)	(314)
Corporate overhead allocation	$ (3,259)	$ (2,672)