Represents the annual rent payments, per square foot, for a lease agreement.

No definition available.

Name:	lub_LeaseAnnualRentPaymentsPerSquareFoot
Namespace Prefix:	lub_
Data Type:	us-types:perUnitItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	lub_Note9RelatedPartiesDetailsLineItems
Namespace Prefix:	lub_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of parties participating in a transaction that are related to the entity.

+ References

No definition available.

+ Details

Name:	lub_NumberOfRelatedPartyEntities
Namespace Prefix:	lub_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of options to extend a lease agreement.

+ References

No definition available.

+ Details

Name:	lub_OptionToExtendLeaseYears
Namespace Prefix:	lub_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

No definition available.

+ Details

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

- Definition

Term of the lessee's leasing arrangement renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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

- Definition

Term of the lessee's leasing arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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

- Definition

Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 272

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055

+ Details

Name:	us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of transactions with related party during the financial reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 850

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 850

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39622-107864

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 850

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

+ Details

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

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=lub_AmendedAndRestatedMasterSalesAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=lub_LeaseAgreementExecutedIn2006Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=lub_NewLeaseAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=lub_PappasEntitiesMember
Namespace Prefix:
Data Type:	na
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Period Type:

Note 9 - Related Parties (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended		0 Months Ended	3 Months Ended	16 Months Ended
	May 06, 2015	May 07, 2014	Nov. 22, 2006	May 07, 2014	May 06, 2015
Amended and Restated Master Sales Agreement [Member] \| Pappas Entities [Member]
Note 9 - Related Parties (Details) [Line Items]
Related Party Transaction, Amounts of Transaction	$ 0	$ 4
New Lease Agreement [Member]
Note 9 - Related Parties (Details) [Line Items]
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest				50.00%
Lease Annual Rent Payments Per Square Foot (in Dollars per Square Foot)				27.56
Option to Extend Lease Years				2
Lessee Leasing Arrangements, Operating Leases, Renewal Term			5 years	5 years
Operating Leases, Rent Expense	107	27
Lease Agreement Executed in 2006 [Member]
Note 9 - Related Parties (Details) [Line Items]
Lease Annual Rent Payments Per Square Foot (in Dollars per Square Foot)					22.00
Option to Extend Lease Years			2
Operating Leases, Rent Expense	$ 278	$ 241
Lessee Leasing Arrangements, Operating Leases, Term of Contract			12 years
Pappas Entities [Member]
Note 9 - Related Parties (Details) [Line Items]
Number of Related Party Entities	2				2