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Note 6 - Property and Equipment, Intangible Assets and Goodwill (Details) (USD $)
12 Months Ended 3 Months Ended
Aug. 27, 2014
Nov. 19, 2014
Note 6 - Property and Equipment, Intangible Assets and Goodwill (Details) [Line Items]    
Goodwill $ 1,681,000us-gaap_Goodwill 1,681,000us-gaap_Goodwill
Goodwill, Impairment Loss 500,000us-gaap_GoodwillImpairmentLoss  
Company Owned Restaurants [Member]    
Note 6 - Property and Equipment, Intangible Assets and Goodwill (Details) [Line Items]    
Goodwill 1,700,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= lub_CompanyOwnedRestaurantsMember
1,700,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= lub_CompanyOwnedRestaurantsMember
Trade Names [Member]    
Note 6 - Property and Equipment, Intangible Assets and Goodwill (Details) [Line Items]    
Finite-Lived Intangible Asset, Useful Life   21 years
Franchise [Member]    
Note 6 - Property and Equipment, Intangible Assets and Goodwill (Details) [Line Items]    
Finite-Lived Intangible Asset, Useful Life   21 years
Fuddruckers Trade Name and Franchise Agreement [Member]    
Note 6 - Property and Equipment, Intangible Assets and Goodwill (Details) [Line Items]    
Amortization of Intangible Assets   300,000us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= lub_FuddruckersTradeNameAndFranchiseAgreementMember
Finite-Lived Intangible Assets, Accumulated Amortization 6,000,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= lub_FuddruckersTradeNameAndFranchiseAgreementMember
 
Intangible Assets Related to Cheeseburger in Paradise [Member]    
Note 6 - Property and Equipment, Intangible Assets and Goodwill (Details) [Line Items]    
Finite-Lived Intangible Asset, Useful Life   15 years
Amortization of Intangible Assets   6,000us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= lub_IntangibleAssetsRelatedToCheeseburgerInParadiseMember
Finite-Lived Intangible Assets, Accumulated Amortization 42,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= lub_IntangibleAssetsRelatedToCheeseburgerInParadiseMember
 
Fuddruckers (Member)    
Note 6 - Property and Equipment, Intangible Assets and Goodwill (Details) [Line Items]    
Goodwill, Gross   200,000us-gaap_GoodwillGross
/ us-gaap_BusinessAcquisitionAxis
= lub_FuddruckersMember
Cheeseburger in Paradise [Member]    
Note 6 - Property and Equipment, Intangible Assets and Goodwill (Details) [Line Items]    
Goodwill, Gross   2,000,000us-gaap_GoodwillGross
/ us-gaap_BusinessAcquisitionAxis
= lub_CheeseburgerInParadisMember