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Note 1 - Organization, Basis of Presentation, and Summary of Significant Accounting Policies - Revenue Arrangements (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Nov. 30, 2014
Nov. 24, 2013
Nov. 30, 2014
Nov. 24, 2013
Revenue $ 132,665us-gaap_SalesRevenueGoodsNet $ 120,026us-gaap_SalesRevenueGoodsNet $ 266,279us-gaap_SalesRevenueGoodsNet $ 229,505us-gaap_SalesRevenueGoodsNet
Revenue from License Fees, R&D Contracts and Royalties/Profit Sharing [Member]        
Revenue 423us-gaap_SalesRevenueGoodsNet
/ us-gaap_TypeOfArrangementAxis
= lndc_RevenueFromLicenseFeesRDContractsAndRoyaltiesProfitSharingMember
143us-gaap_SalesRevenueGoodsNet
/ us-gaap_TypeOfArrangementAxis
= lndc_RevenueFromLicenseFeesRDContractsAndRoyaltiesProfitSharingMember
635us-gaap_SalesRevenueGoodsNet
/ us-gaap_TypeOfArrangementAxis
= lndc_RevenueFromLicenseFeesRDContractsAndRoyaltiesProfitSharingMember
201us-gaap_SalesRevenueGoodsNet
/ us-gaap_TypeOfArrangementAxis
= lndc_RevenueFromLicenseFeesRDContractsAndRoyaltiesProfitSharingMember
Revenue from Multiple Element Arrangements [Member]        
Revenue 372us-gaap_SalesRevenueGoodsNet
/ us-gaap_TypeOfArrangementAxis
= lndc_RevenueFromMultipleElementArrangementsMember
1,941us-gaap_SalesRevenueGoodsNet
/ us-gaap_TypeOfArrangementAxis
= lndc_RevenueFromMultipleElementArrangementsMember
947us-gaap_SalesRevenueGoodsNet
/ us-gaap_TypeOfArrangementAxis
= lndc_RevenueFromMultipleElementArrangementsMember
2,563us-gaap_SalesRevenueGoodsNet
/ us-gaap_TypeOfArrangementAxis
= lndc_RevenueFromMultipleElementArrangementsMember
Revenue Recorded Upon Acceptance in Foreign Port [Member]        
Revenue 22,106us-gaap_SalesRevenueGoodsNet
/ us-gaap_TypeOfArrangementAxis
= lndc_RevenueRecordedUponAcceptanceInForeignPortMember
22,940us-gaap_SalesRevenueGoodsNet
/ us-gaap_TypeOfArrangementAxis
= lndc_RevenueRecordedUponAcceptanceInForeignPortMember
48,693us-gaap_SalesRevenueGoodsNet
/ us-gaap_TypeOfArrangementAxis
= lndc_RevenueRecordedUponAcceptanceInForeignPortMember
44,329us-gaap_SalesRevenueGoodsNet
/ us-gaap_TypeOfArrangementAxis
= lndc_RevenueRecordedUponAcceptanceInForeignPortMember
Revenue Recorded Upon Shipment [Member]        
Revenue 109,764us-gaap_SalesRevenueGoodsNet
/ us-gaap_TypeOfArrangementAxis
= lndc_RevenueRecordedUponShipmentMember
95,002us-gaap_SalesRevenueGoodsNet
/ us-gaap_TypeOfArrangementAxis
= lndc_RevenueRecordedUponShipmentMember
216,004us-gaap_SalesRevenueGoodsNet
/ us-gaap_TypeOfArrangementAxis
= lndc_RevenueRecordedUponShipmentMember
182,412us-gaap_SalesRevenueGoodsNet
/ us-gaap_TypeOfArrangementAxis
= lndc_RevenueRecordedUponShipmentMember
Fair Value, Inputs, Level 1 [Member]        
Revenue 132,665us-gaap_SalesRevenueGoodsNet
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
    229,505us-gaap_SalesRevenueGoodsNet
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
Fair Value, Inputs, Level 2 [Member]        
Revenue   120,026us-gaap_SalesRevenueGoodsNet
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
   
Fair Value, Inputs, Level 3 [Member]        
Revenue     $ 266,279us-gaap_SalesRevenueGoodsNet
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member