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Stock-Based Compensation (Detail) (USD $)	3 Months Ended								0 Months Ended			3 Months Ended	0 Months Ended			3 Months Ended
	Aug. 03, 2014 Stock Options [Member]	Jul. 28, 2013 Stock Options [Member]	Aug. 03, 2014 Stock Options [Member] Selling, general and administrative expense [Member]	Jul. 28, 2013 Stock Options [Member] Selling, general and administrative expense [Member]	Aug. 03, 2014 Time Vested Restricted Stock Awards [Member]	Jul. 28, 2013 Time Vested Restricted Stock Awards [Member]	Aug. 03, 2014 Time Vested Restricted Stock Awards [Member] Selling, general and administrative expense [Member]	Jul. 28, 2013 Time Vested Restricted Stock Awards [Member] Selling, general and administrative expense [Member]	Jun. 24, 2014 Performance Based Restricted Stock Units [Member]	Jun. 25, 2013 Performance Based Restricted Stock Units [Member]	Jul. 11, 2012 Performance Based Restricted Stock Units [Member]	Aug. 03, 2014 Performance Based Restricted Stock Units [Member]	Jun. 24, 2014 Performance Based Restricted Stock Units [Member] Maximum [Member]	Jun. 25, 2013 Performance Based Restricted Stock Units [Member] Maximum [Member]	Jul. 11, 2012 Performance Based Restricted Stock Units [Member] Maximum [Member]	Aug. 03, 2014 Performance Based Restricted Stock Units [Member] Selling, general and administrative expense [Member]	Jul. 28, 2013 Performance Based Restricted Stock Units [Member] Selling, general and administrative expense [Member]	Aug. 03, 2014 Common Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options granted	0
Number of options to purchase common stock outstanding	153,950
Weighted average exercise price for options outstanding	$ 6.70
Weighted average contractual term for options outstanding	3 years 4 months 24 days
Aggregate intrinsic value for options outstanding	$ 1,700,000
Number of options exercisable	153,950
Weighted average exercise price for options exercisable	$ 6.70
Weighted average contractual term for options exercisable	3 years 4 months 24 days
Aggregate intrinsic value for options exercisable	1,700,000
Number of options exercised	0
Aggregate intrinsic value for options exercised		171,000
Number of unvested stock option	0
Unrecognized stock based compensation cost	0
Share-based compensation expense			0	6,000			4,000	27,000								42,000	119,000
Number of shares granted					0								102,845	72,380	120,000			0
Number of shares outstanding and unvested					0
Remaining unrecognized compensation cost					0							1,300,000
Number of shares vested					61,667	61,667
Weighted average fair value of vested shares					$ 257,000	$ 249,000
Weighted average fair value of vested shares, per share					$ 4.17	$ 4.04
Closing price of common stock on the date of grant									$ 17.70	$ 17.12	$ 10.21
Vesting period									3 years	3 years	3 years
Weighted average period over which unrecognized compensation cost is expected to be recognized												2 years 2 months 12 days

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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Unrecognized cost of unvested options awarded to employees as compensation.

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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 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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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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Net number of share options (or share units) granted during the period.

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Number of non-vested options outstanding.

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

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