Basis of Presentation - Additional Information (Detail) (USD $)	3 Months Ended					0 Months Ended
	May 03, 2014 Subsidiary	May 04, 2013	May 03, 2014 Employee Stock Purchase Plan [Member]	May 04, 2013 Employee Stock Purchase Plan [Member]	May 03, 2014 2005 Plan [Member]	May 30, 2014 Subsequent Event [Member] 2005 Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Number of subsidiaries	9
Pre-tax compensation cost for stock-based employee compensation	$ 200,000	$ 200,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized						1,500,000
Common stock authorized under 2005 plan			600,000		3,500,000
Common stock reserved for issuance					15,670
Total unrecognized compensation cost	1,352,000
Value of common stock purchase by employees			85.00%
Proceeds from the issuance of common stock under employee stock purchase plan	$ 55,000	$ 62,000	$ 100,000	$ 100,000