Basis of Presentation - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended
	May 02, 2015	May 02, 2015	May 03, 2014
Defined Benefit Plan Disclosure [Line Items]
Number of subsidiaries		10
Pre-tax compensation cost for stock-based employee compensation		$ 200,000	$ 200,000
Total unrecognized compensation cost	2,100,000	2,100,000
Proceeds from the issuance of common stock under employee stock purchase plan		53,000	55,000
2005 Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Common stock authorized	3,500,000	3,500,000
Common stock reserved for issuance	726,925	726,925
Employee Stock Purchase Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Common stock authorized	600,000	600,000
Stock Issued During Period, Shares, Employee Stock Purchase Plans	499,231
Value of common stock purchase by employees		85.00%
Proceeds from the issuance of common stock under employee stock purchase plan		$ 100,000	$ 100,000