Geographic Information and Concentration of Risk - Schedule of Significant Customers Accounting for at Least 10% of Net Sales (Details) (Net sales revenue)	12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%
Minimum concentration risk threshold	10.00%
Samsung Electronics (and affiliates)
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage	12.00%	13.00%	12.00%
Huawei Technologies (and affiliates)
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage	10.00%	7.00%	8.00%
Frontek Technology Corp
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage	6.00%	10.00%	11.00%