Note 6 - Property and Equipment, Intangible Assets and Goodwill (Details) - Intangible Assets (USD $) In Thousands, unless otherwise specified	May 06, 2015	Aug. 27, 2014
Note 6 - Property and Equipment, Intangible Assets and Goodwill (Details) - Intangible Assets [Line Items]
Gross carrying amount	$ 30,023	$ 30,023
Accumulated amortization	(7,009)	(6,009)
Net carrying amount	23,014us-gaap_FiniteLivedIntangibleAssetsNet	24,014us-gaap_FiniteLivedIntangibleAssetsNet
Fuddruckers Trade Name and Franchise Agreement [Member]
Note 6 - Property and Equipment, Intangible Assets and Goodwill (Details) - Intangible Assets [Line Items]
Gross carrying amount	29,607	29,607
Accumulated amortization	(6,749)	(5,767)
Net carrying amount	22,858	23,840
Cheeseburger in Paradise Trade Name and License Agreements [Member]
Note 6 - Property and Equipment, Intangible Assets and Goodwill (Details) - Intangible Assets [Line Items]
Gross carrying amount	416	416
Accumulated amortization	(260)	(242)
Net carrying amount	$ 156	$ 174

Name:	lub_Note6PropertyandEquipmentIntangibleAssetsandGoodwillDetailsIntangibleAssetsLineItems
Namespace Prefix:	lub_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

+ Details

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

- Definition

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

+ References

+ Details

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

- Definition

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

+ References

+ Details

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

- Details

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

- Details

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