Geographic Information and Concentration of Risk - Schedule Of Significant Customers Accounting For At Least 10% Of Net Sales During Period (Details) (Sales Revenue, Goods, Net [Member])	3 Months Ended		6 Months Ended
	Jul. 28, 2013	Jul. 29, 2012	Jul. 28, 2013	Jul. 29, 2012
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%	100.00%
Minimum concentration risk threshold	10.00%
Samsung Electronics (And Affiliates) [Member]
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage	11.00%	10.00%	13.00%	12.00%
Huawei Technologies Co. (And Affiliates) [Member]
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage	9.00%	11.00%	9.00%	11.00%