Business Segment Reporting - Operations by Business Segment (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Feb. 24, 2019	Feb. 25, 2018	Feb. 24, 2019	Feb. 25, 2018
Segment Reporting Information [Line Items]
Product sales	$ 155,687	$ 144,909	$ 405,267	$ 383,151
Gross profit	21,217	19,806	54,147	53,529
Net income (loss) from continuing operations	1,067	16,281	672	19,050
Depreciation and amortization	4,048	3,142	10,506	9,076
Dividend income	413	413	1,238	1,238
Interest income	34	87	113	160
Interest expense, net	1,771	531	3,275	1,415
Income tax (benefit) expense	242	(12,827)	584	(11,352)
International sales
Segment Reporting Information [Line Items]
Product sales	36,201	33,492	83,319	75,589
Curation Foods
Segment Reporting Information [Line Items]
Product sales	131,984	121,950	353,502	333,915
Gross profit	9,641	8,197	33,926	33,181
Net income (loss) from continuing operations	(6,817)	(2,801)	(5,466)	365
Depreciation and amortization	2,875	2,120	7,111	6,050
Dividend income	413	413	1,238	1,238
Interest income	26	32	87	60
Interest expense, net	1,164	0	2,027	0
Income tax (benefit) expense	(829)	(609)	(217)	393
Curation Foods \| International sales
Segment Reporting Information [Line Items]
Product sales	24,172	20,336	64,732	56,259
Lifecore
Segment Reporting Information [Line Items]
Product sales	23,703	22,959	51,765	49,236
Gross profit	11,576	11,609	20,221	20,348
Net income (loss) from continuing operations	5,836	6,175	6,586	7,280
Depreciation and amortization	1,028	940	2,982	2,715
Dividend income	0	0	0	0
Interest income	0	0	0	0
Interest expense, net	0	0	0	0
Income tax (benefit) expense	1,946	1,763	2,196	2,110
Lifecore \| International sales
Segment Reporting Information [Line Items]
Product sales	12,029	13,156	18,587	19,330
Other
Segment Reporting Information [Line Items]
Product sales	0	0	0	0
Gross profit	0	0	0	0
Net income (loss) from continuing operations	2,048	12,907	(448)	11,405
Depreciation and amortization	145	82	413	311
Dividend income	0	0	0	0
Interest income	8	55	26	100
Interest expense, net	607	531	1,248	1,415
Income tax (benefit) expense	(875)	(13,981)	(1,395)	(13,855)
Other \| International sales
Segment Reporting Information [Line Items]
Product sales	$ 0	$ 0	$ 0	$ 0

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