Basis of Presentation - Additional Information (Detail) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2015 USD ($) shares	Nov. 01, 2014 USD ($)	Oct. 31, 2015 USD ($) Subsidiary shares	Nov. 01, 2014 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Number of subsidiaries | Subsidiary			11
Pre-tax compensation cost for stock-based employee compensation | $	$ 300	$ 200	$ 900	$ 600
Total unrecognized compensation cost | $	$ 1,441		1,441
Proceeds from the issuance of common stock under employee stock purchase plan | $			$ 53	55
2005 Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Common stock authorized (in shares) | shares	3,500,000		3,500,000
Common stock reserved for issuance (in shares) | shares	764,855		764,855
Employee Stock Purchase Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Common stock authorized (in shares) | shares	600,000		600,000
Value of common stock purchase by employees			85.00%
Number of shares issued since inception (in shares) | shares	499,231		499,231
Proceeds from the issuance of common stock under employee stock purchase plan | $			$ 100	$ 100