Goodwill and Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
May 31, 2020	May 26, 2019
Indefinite-lived Intangible Assets [Line Items]
Accumulated Amortization	$ 10,295	$ 8,453
Intangible Assets, Gross (Excluding Goodwill)	48,400	53,700
Trademarks/tradenames
Indefinite-lived Intangible Assets [Line Items]
Gross Carrying Amount	26,200	30,800
Impairment of intangible assets	872	872
Customer relationships
Indefinite-lived Intangible Assets [Line Items]
Gross Carrying Amount	22,200	22,900
Accumulated Amortization	9,423	7,581
Curation Foods \| Eat Smart \| Trademarks/tradenames
Indefinite-lived Intangible Assets [Line Items]
Gross Carrying Amount	9,100	9,100
Impairment of intangible assets	$ 872	872
Curation Foods \| Eat Smart \| Customer relationships
Indefinite-lived Intangible Assets [Line Items]
Amortization Period (years)	12 years
Gross Carrying Amount	$ 7,500	7,500
Accumulated Amortization	4,663	4,087
Curation Foods \| O Olive & Vinegar \| Trademarks/tradenames
Indefinite-lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 500	1,600
Curation Foods \| O Olive & Vinegar \| Customer relationships
Indefinite-lived Intangible Assets [Line Items]
Amortization Period (years)	13 years
Gross Carrying Amount	$ 0	700
Accumulated Amortization	0	143
Curation Foods \| Yucatan Foods, LP \| Trademarks/tradenames
Indefinite-lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 12,400	15,900
Curation Foods \| Yucatan Foods, LP \| Customer relationships
Indefinite-lived Intangible Assets [Line Items]
Amortization Period (years)	11 years
Gross Carrying Amount	$ 11,000	11,000
Accumulated Amortization	1,650	550
Lifecore \| Trademarks/tradenames
Indefinite-lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 4,200	4,200
Lifecore \| Customer relationships
Indefinite-lived Intangible Assets [Line Items]
Amortization Period (years)	12 years
Gross Carrying Amount	$ 3,700	3,700
Accumulated Amortization	$ 3,110	$ 2,801

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

+ Details

Name:	us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Gross carrying amount before accumulated amortization as of the balance sheet date to an asset acquired in a business combination representing a favorable existing relationship with customers having a finite beneficial life.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

+ Details

Name:	us-gaap_FiniteLivedCustomerRelationshipsGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

+ Details

Name:	us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

+ Details

Name:	us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount before accumulated amortization of intangible assets, excluding goodwill.

+ References

No definition available.

+ Details

Name:	us-gaap_IntangibleAssetsGrossExcludingGoodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TrademarksAndTradeNamesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CustomerRelationshipsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=lndc_CurationFoodsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ReportingUnitAxis=lndc_EatSmartMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ReportingUnitAxis=lndc_OOliveAndVinegarMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ReportingUnitAxis=lndc_YucatanFoodsLPMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=lndc_LifecoreMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: