Geographic Information and Concentration of Risk - Summary Of Sales Activity To Countries That Represented Greater Than 10% Of Total Net Sales (Details) (Sales Revenue, Goods, Net [Member])	3 Months Ended
	Apr. 27, 2014	Apr. 28, 2013
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage	100.00%	100.00%
Minimum concentration risk threshold	10.00%
China Including Hong Kong [Member]
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage	34.00%	34.00%
United States [Member]
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage	13.00%	15.00%
South Korea [Member]
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage	11.00%	13.00%
Japan [Member]
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage	10.00%	10.00%