Summary of Significant Accounting Policies - Summary of Estimated Useful Lives or Expected Lease Term (Detail)	12 Months Ended
	Feb. 01, 2014
Equipment and fixtures [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives or the expected lease term	3 years
Equipment and fixtures [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives or the expected lease term	10 years
Leasehold improvements [Member] | Average [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives or the expected lease term	10 years
Electronic equipment and software [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives or the expected lease term	3 years
Electronic equipment and software [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives or the expected lease term	5 years