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Stock-Based Compensation (Detail) (USD $)		9 Months Ended													9 Months Ended						12 Months Ended		9 Months Ended
	Jan. 26, 2014	Jan. 26, 2014 Stock Options [Member]	Jan. 27, 2013 Stock Options [Member]	Jan. 26, 2014 Stock Options [Member] Selling, general and administrative expense [Member]	Jan. 27, 2013 Stock Options [Member] Selling, general and administrative expense [Member]	Jan. 26, 2014 Stock Compensation Plan [Member] Granted on October 1, 2013 [Member] Outside Director [Member]	Jan. 26, 2014 Stock Compensation Plan [Member] Granted on October 8, 2012 [Member] Outside Director [Member]	Jan. 27, 2013 Stock Compensation Plan [Member] Granted on October 8, 2012 [Member] Outside Director [Member]	Jan. 26, 2014 Stock Compensation Plan [Member] Selling, general and administrative expense [Member] Outside Director [Member]	Jan. 27, 2013 Stock Compensation Plan [Member] Selling, general and administrative expense [Member] Outside Director [Member]	Jan. 26, 2014 Time Vested Restricted Stock Awards [Member]	Jan. 27, 2013 Time Vested Restricted Stock Awards [Member]	Jan. 26, 2014 Time Vested Restricted Stock Awards [Member] Granted on January 7, 2009 [Member] Vesting on May 1, 2014 [Member]	Jan. 26, 2014 Time Vested Restricted Stock Awards [Member] Granted on July 1, 2009 [Member] Vesting on July 1, 2014 [Member]	Jan. 26, 2014 Time Vested Restricted Stock Awards [Member] Selling, general and administrative expense [Member]	Jan. 27, 2013 Time Vested Restricted Stock Awards [Member] Selling, general and administrative expense [Member]	Jan. 26, 2014 Performance Based Restricted Stock Units [Member]	Jan. 26, 2014 Performance Based Restricted Stock Units [Member] Granted on June 25, 2013 [Member]	Jan. 26, 2014 Performance Based Restricted Stock Units [Member] Granted on June 25, 2013 [Member] Maximum [Member]	Jan. 26, 2014 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]	Apr. 28, 2013 Performance Based Restricted Stock Units [Member] Granted on July 11, 2012 [Member] Maximum [Member]	Jan. 26, 2014 Performance Based Restricted Stock Units [Member] Selling, general and administrative expense [Member]	Jan. 27, 2013 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 granted		0
Number of options to purchase common stock outstanding		153,950
Number of options exercisable		153,950
Weighted average exercise price for options outstanding		$ 6.70
Weighted average exercise price for options exercisable		$ 6.70
Weighted average contractual term for options outstanding		3 years 10 months 24 days
Weighted average contractual term for options exercisable		3 years 10 months 24 days
Aggregate intrinsic value for options outstanding		$ 2,100,000
Aggregate intrinsic value for options exercised		224,000	90,000
Unrecognized stock based compensation cost	0
Share-based compensation expense				10,000	53,000				57,000	20,000					52,000	116,000							432,000	119,000
Number of shares granted						3,000		1,658			0								72,380			120,000
Vesting period						0 days	0 days											3 years		3 years
Closing price of common stock at the date of grant						$ 18.84		$ 12.13										$ 17.12			$ 10.21
Number of shares outstanding and unvested											61,667		35,000	26,667
Weighted average fair value of outstanding and unvested shares, per share											$ 4.25
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
Remaining unrecognized compensation cost											$ 19,000						$ 1,100,000
Weighted average period over which unrecognized compensation cost is expected to be recognized											4 months 24 days						1 year 10 months 24 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 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 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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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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