Stock Based Compensation (Detail) (USD $) Share data in Millions, unless otherwise specified	3 Months Ended	9 Months Ended
Oct. 27, 2012	Oct. 29, 2011	Oct. 27, 2012	Oct. 29, 2011
Allocated Share-based Compensation Expense	$ 84,000	$ 61,000	$ 212,000	$ 244,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	800,000		800,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition			2 years 73 days
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares)	20.6		20.6
Share-based Compensation Arrangement by Share-based Payment Award Granted (in Shares)			5.4
Share-based Compensation Arrangement by Share-based Payment Award Shares Outstanding Vested And Exercisable (in Shares)	4.2		4.2
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares)	2.0		2.0
Intrinsic Value Of Stock Awards Outstanding	2,000,000		2,000,000
Intrinsic Value Of Stock Awards Exercisable	$ 399,000		$ 399,000

Intrinsic value of stock awards exercisable.

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- Definition

Intrinsic value of stock awards outstanding as of the reporting date.

+ References

No definition available.

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- Definition

Number of shares granted under stock awards.

+ References

No definition available.

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- Definition

Number of shares outstanding vested and exercisable under stock awards.

+ References

No definition available.

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph g(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

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-Section F

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-Paragraph 64

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

+ References

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

+ References

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