Note 7 - Impairment of Long-Lived Assets, Discontinued Operations and Property Held for Sale (Details) - Impairment Charges to Income from Operations (USD $)	3 Months Ended
Nov. 19, 2014	Nov. 20, 2013
Impairment Charges to Income from Operations [Abstract]
Provision for asset impairments	$ 0us-gaap_AssetImpairmentCharges	$ 210,000us-gaap_AssetImpairmentCharges
Net loss on disposition of property and equipment	290,000	51,000
	$ 290,000	$ 261,000
Effect on EPS:
Basic (in Dollars per share)	$ (0.01)	$ (0.01)
Assuming dilution (in Dollars per share)	$ (0.01)lub_ImpactOnEarningsPerShareDiluted	$ (0.01)lub_ImpactOnEarningsPerShareDiluted

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Represents the effect on earnings per share, assuming dilution.

+ References

No definition available.

+ Details

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- Definition

Represents the total of impairment and gain or loss on the sale of property and equipment.

+ References

No definition available.

+ Details

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- Details

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- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 45

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2420-110228

+ Details

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- Definition

Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

+ References

+ Details

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- Definition

After tax earnings per share or per unit impact arising from asset impairment.

+ References

No definition available.

+ Details

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