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Stock-Based Compensation (Detail) (USD $)	3 Months Ended				3 Months Ended									12 Months Ended		3 Months Ended
	Jul. 28, 2013 Time Vested Restricted Stock Awards [Member]	Jul. 29, 2012 Time Vested Restricted Stock Awards [Member]	Jul. 28, 2013 Time Vested Restricted Stock Awards [Member] Granted on January 7, 2009 [Member] Vesting on May 1, 2014 [Member]	Jul. 28, 2013 Time Vested Restricted Stock Awards [Member] Granted on July 1, 2009 [Member] Vesting on July 1, 2014 [Member]	Jul. 28, 2013 Time Vested Restricted Stock Awards [Member] Selling, general and administrative expense [Member]	Jul. 29, 2012 Time Vested Restricted Stock Awards [Member] Selling, general and administrative expense [Member]	Jul. 28, 2013 Stock Options [Member]	Jul. 29, 2012 Stock Options [Member]	Jul. 28, 2013 Stock Options [Member] Selling, general and administrative expense [Member]	Jul. 29, 2012 Stock Options [Member] Selling, general and administrative expense [Member]	Jul. 28, 2013 Performance Based Restricted Stock Units [Member]	Jul. 28, 2013 Performance Based Restricted Stock Units [Member] Granted on June 25, 2013 [Member]	Jul. 28, 2013 Performance Based Restricted Stock Units [Member] Granted on June 25, 2013 [Member] Maximum [Member]	Apr. 28, 2013 Performance Based Restricted Stock Units [Member] Granted on July 11, 2012 [Member]	Apr. 28, 2013 Performance Based Restricted Stock Units [Member] Granted on July 11, 2012 [Member] Maximum [Member]	Jul. 28, 2013 Performance Based Restricted Stock Units [Member] Selling, general and administrative expense [Member]	Jul. 29, 2012 Performance Based Restricted Stock Units [Member] Selling, general and administrative expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options to purchase common stock outstanding							165,325
Weighted average exercise price for options outstanding							$ 6.86
Weighted average contractual term for options outstanding							4 years 1 month 6 days
Aggregate intrinsic value for options outstanding							$ 2,100,000
Number of options exercisable							157,325
Weighted average exercise price for options exercisable							$ 7.11
Weighted average contractual term for options exercisable							4 years 1 month 6 days
Aggregate intrinsic value for options exercisable							1,900,000
Aggregate intrinsic value for options exercised							171,000
Number of options exercised								0
Remaining unrecognized compensation cost	42,000						4,000				1,400,000
Weighted average period over which unrecognized compensation cost is expected to be recognized	10 months 24 days						4 months 24 days				2 years 4 months 24 days
Share-based compensation expense					27,000	28,000			6,000	25,000						119,000	17,000
Number of shares outstanding and unvested	61,667		35,000	26,667
Weighted average fair value of outstanding and unvested shares, per share	$ 4.21
Number of shares vested	61,667	61,665
Weighted average fair value of vested shares	$ 249,000	$ 232,000
Weighted average fair value of vested shares, per share	$ 4.04	$ 3.76
Number of shares granted													72,380		120,000
Closing price of common stock on the date of grant												$ 17.12		$ 10.21
Vesting period												3 years		3 years

X

- 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.

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Unrecognized cost of unvested share-based compensation awards.

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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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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Number of share options (or share units) exercised during the current period.

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