Geographic Information and Concentration of Risk - Schedule Of Significant Customers Having An Outstanding Receivable Balance That Represents At Least 10% Of Total Net (Details) (Accounts Receivable [Member])	3 Months Ended	12 Months Ended
	Apr. 27, 2014	Jan. 26, 2014
Geographic Information And Concentration Of Risk [Line Items]
Minimum concentration risk threshold	10.00%
Samsung Electronics (And Affiliates) [Member]
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage	16.00%	13.00%