Stock-Based Compensation (Detail) (USD $)	6 Months Ended													6 Months Ended						12 Months Ended		6 Months Ended
	Oct. 27, 2013 Stock Options [Member]	Oct. 28, 2012 Stock Options [Member]	Oct. 27, 2013 Stock Options [Member] Selling, general and administrative expense [Member]	Oct. 28, 2012 Stock Options [Member] Selling, general and administrative expense [Member]	Oct. 27, 2013 Stock Compensation Plan [Member] Granted on October 1, 2013 [Member] Outside Director [Member]	Oct. 27, 2013 Stock Compensation Plan [Member] Granted on October 8, 2012 [Member] Outside Director [Member]	Oct. 28, 2012 Stock Compensation Plan [Member] Granted on October 8, 2012 [Member] Outside Director [Member]	Oct. 27, 2013 Stock Compensation Plan [Member] Selling, general and administrative expense [Member]	Oct. 28, 2012 Stock Compensation Plan [Member] Selling, general and administrative expense [Member]	Oct. 27, 2013 Time Vested Restricted Stock Awards [Member]	Oct. 28, 2012 Time Vested Restricted Stock Awards [Member]	Oct. 27, 2013 Time Vested Restricted Stock Awards [Member] Granted on January 7, 2009 [Member] Vesting on May 1, 2014 [Member]	Oct. 27, 2013 Time Vested Restricted Stock Awards [Member] Granted on July 1, 2009 [Member] Vesting on July 1, 2014 [Member]	Oct. 27, 2013 Time Vested Restricted Stock Awards [Member] Selling, general and administrative expense [Member]	Oct. 28, 2012 Time Vested Restricted Stock Awards [Member] Selling, general and administrative expense [Member]	Oct. 27, 2013 Performance Based Restricted Stock Units [Member]	Oct. 27, 2013 Performance Based Restricted Stock Units [Member] Granted on June 25, 2013 [Member]	Oct. 27, 2013 Performance Based Restricted Stock Units [Member] Granted on June 25, 2013 [Member] Maximum [Member]	Oct. 27, 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]	Apr. 28, 2013 Performance Based Restricted Stock Units [Member] Granted on July 11, 2012 [Member] Maximum [Member]	Oct. 27, 2013 Performance Based Restricted Stock Units [Member] Selling, general and administrative expense [Member]	Oct. 28, 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 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	4 years 1 month 6 days
Aggregate intrinsic value for options outstanding	$ 2,000,000
Number of options exercisable	145,950
Weighted average exercise price for options exercisable	$ 6.96
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	224,000	18,000
Remaining unrecognized compensation cost	2,000									30,000						1,200,000
Weighted average period over which unrecognized compensation cost is expected to be recognized	2 months 12 days									7 months 6 days						2 years 1 month 6 days
Share-based compensation expense			8,000	44,000				57,000	20,000					38,000	65,000							273,000	68,000
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										$ 4.19
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