Stock-Based Compensation - Additional Information (Detail) (USD $)	3 Months Ended							1 Months Ended		1 Months Ended			3 Months Ended		1 Months Ended	3 Months Ended		1 Months Ended	9 Months Ended	1 Months Ended		3 Months Ended		1 Months Ended	3 Months Ended			1 Months Ended	3 Months Ended				1 Months Ended	3 Months Ended	1 Months Ended	3 Months Ended
	May 04, 2013	Apr. 28, 2012	May 04, 2013 Cost of goods sold	Apr. 28, 2012 Cost of goods sold	May 04, 2013 Selling, General and Administrative Expense	Apr. 28, 2012 Selling, General and Administrative Expense	Jun. 14, 2006 1996 Equity Incentive Plan	Jun. 14, 2006 1996 Equity Incentive Plan Maximum	Jun. 05, 2012 2006 Equity Incentive Plan	Jun. 05, 2012 2006 Equity Incentive Plan Maximum	Mar. 31, 2012 2006 Equity Incentive Plan Chief Executive Officer	Mar. 31, 2011 2006 Equity Incentive Plan Chief Executive Officer	May 04, 2013 2006 Equity Incentive Plan Chief Executive Officer	Apr. 28, 2012 2006 Equity Incentive Plan Chief Executive Officer	May 23, 2013 2006 Equity Incentive Plan Subsequent Event Chief Executive Officer	May 04, 2013 2006 Equity Incentive Plan Restricted Stock	Apr. 28, 2012 2006 Equity Incentive Plan Restricted Stock	Apr. 30, 2012 2006 Equity Incentive Plan Restricted Stock Independent consultant	Oct. 27, 2012 2006 Equity Incentive Plan Restricted Stock Independent consultant	Mar. 31, 2012 2006 Equity Incentive Plan Restricted Stock Non Employee Director	Jun. 30, 2011 2006 Equity Incentive Plan Restricted Stock Non Employee Director	Apr. 28, 2012 2006 Equity Incentive Plan Restricted Stock Non Employee Director	Apr. 28, 2012 2006 Equity Incentive Plan Employee Stock Option	Mar. 31, 2011 2006 Equity Incentive Plan Employee Stock Option Employees	May 04, 2013 2006 Equity Incentive Plan Employee Stock Option Employees	May 04, 2013 2006 Equity Incentive Plan Employee Stock Option Accelerated Vesting of Stock Options Employees	Jun. 05, 2012 1996 NEDSOP	Jun. 05, 2012 1996 NEDSOP Maximum	May 04, 2013 2012 Equity Incentive Plan	May 04, 2013 2012 Equity Incentive Plan Maximum	May 04, 2013 2012 Equity Incentive Plan Minimum	May 04, 2013 2012 Equity Incentive Plan Minimum Persons possessing 10% or more of voting power	Jun. 30, 2012 2012 Equity Incentive Plan Restricted Stock Non Employee Director	May 04, 2013 2012 Equity Incentive Plan Restricted Stock Non Employee Director	Jun. 30, 1996 ESPP	May 04, 2013 ESPP	Apr. 28, 2012 ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant							732,456		942,602																		34,976		4,676,349							652,254
Aggregate number of shares authorized for grant							18,300,000		3,082,456																		720,000								1,350,000
Options, expiration period								10 years		10 years																		10 years		8 years
Exercise price percentage on fair market value of common stock on date of grant																															100.00%	110.00%
Number of additional shares authorized for grant																													3,100,000
Stock Purchase Plan discount																																			15.00%
Stock-based compensation expense	$ 960,000	$ 1,001,000	$ 248,000	$ 161,000	$ 700,000	$ 800,000													$ 25,000			$ 49,000			$ 1,100,000	$ 100,000								$ 50,000		$ 89,000	$ 42,000
Award grants in period																		2,525		515	25,387												21,008
Vesting period																								4 years										1 year
Number of options granted	20,000										100,000	500,000												214,000
Number of options vested															500,000
Total fair value of shares vested	1,400,000	900,000
Unrecognized expense	$ 5,300,000	$ 8,000,000											$ 132,000	$ 319,000		$ 17,000	$ 38,000						$ 400,000
Unrecognized expense, weighted average recognition period	2 years 4 months 10 days	2 years 11 months 12 days											2 years 11 months 1 day	3 years 11 months 1 day		1 month 2 days	1 month 17 days						2 years 11 months 1 day
Weighted average fair value at grant date													$ 3.44