Business Segment Reporting - Operations by Business Segment (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	May 26, 2019	Feb. 24, 2019	Nov. 25, 2018	Aug. 26, 2018	May 27, 2018	Feb. 25, 2018	Nov. 26, 2017	Aug. 27, 2017	May 26, 2019	May 27, 2018	May 28, 2017
Segment Reporting Information [Line Items]
Net sales									$ 557,559	$ 524,227	$ 469,776
Gross profit	$ 26,212	$ 21,569	$ 16,885	$ 16,337	$ 24,809	$ 19,806	$ 14,921	$ 18,802	81,003	78,338	79,212
Net income (loss) from continuing operations	367	$ 1,533	$ (113)	$ 335	6,711	$ 16,281	$ 414	$ 2,355	2,122	25,761	10,135
Identifiable assets	519,091				404,703				519,091	404,703	358,608
Depreciation and amortization									15,230	12,412	10,677
Capital expenditures									44,734	33,590	23,003
Dividend income									1,650	1,650	1,650
Interest income									145	211	16
Interest expense, net									5,230	1,950	1,826
Income tax (benefit) expense									1,518	(9,363)	4,040
Curation Foods
Segment Reporting Information [Line Items]
Net sales									481,686	458,800	410,384
Gross profit									49,305	49,770	52,457
Net income (loss) from continuing operations									(6,229)	17,010	2,410
Identifiable assets	367,352				264,067				367,352	264,067	219,739
Depreciation and amortization									10,360	8,196	7,312
Capital expenditures									30,583	13,052	11,476
Dividend income									1,650	1,650	1,650
Interest income									112	93	16
Interest expense, net									3,278	1,554	674
Income tax (benefit) expense									(1,373)	(9,748)	823
Lifecore
Segment Reporting Information [Line Items]
Net sales									75,873	65,427	59,392
Gross profit									31,698	28,568	26,755
Net income (loss) from continuing operations									12,070	11,631	10,228
Identifiable assets	145,558				129,342				145,558	129,342	104,492
Depreciation and amortization									4,140	3,679	3,054
Capital expenditures									12,965	16,454	11,169
Dividend income									0	0	0
Interest income									0	0	0
Interest expense, net									0	0	13
Income tax (benefit) expense									4,024	2,638	2,938
Other
Segment Reporting Information [Line Items]
Net sales									0	0	0
Gross profit									0	0	0
Net income (loss) from continuing operations									(3,719)	(2,880)	(2,503)
Identifiable assets	$ 6,181				$ 11,294				6,181	11,294	34,377
Depreciation and amortization									730	537	311
Capital expenditures									1,186	4,084	358
Dividend income									0	0	0
Interest income									33	118	0
Interest expense, net									1,952	396	1,139
Income tax (benefit) expense									$ (1,133)	$ (2,253)	$ 279