Stock Option Activity (Detail) (Employee Stock Plan, 1992 Plan, USD $)	6 Months Ended
	Aug. 03, 2013
Employee Stock Plan, 1992 Plan
Stock Options
Outstanding at beginning of year	1,329,815
Options granted
Options canceled	(11,000)
Options exercised	(400,040)	[1]
Outstanding at end of quarter	918,775
Options exercisable at end of quarter	918,775
Outstanding at beginning of year	$ 6.35
Options granted
Options canceled	$ 8.64
Options exercised	$ 5.16	[1]
Outstanding at end of quarter	$ 6.84
Options exercisable at end of quarter	$ 6.84
Stock Options
Outstanding at end of quarter	1 year 1 month 6 days
Options exercisable at end of quarter	1 year 1 month 6 days
Aggregate Intrinsic Value
Outstanding at end of quarter	$ 107,450
Options exercisable at end of quarter	$ 107,450

[1] During the first six months of fiscal 2013, options to purchase 400,040 shares of common stock, with an intrinsic value of approximately $183,000, were exercised. Includes options that were exercised through net share settlement. As a result, only 96,242 shares were issued with no corresponding option cost.