Concentration of Risk - Schedule of Significant Customers Accounting for at Least 10% of Net Sales (Details) - Net sales revenue		12 Months Ended
		Jan. 29, 2017	Jan. 31, 2016	Jan. 25, 2015
Geographic Information And Concentration Of Risk [Line Items]
Minimum concentration risk threshold		10.00%
Arrow Electronics (and affiliates)
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage		10.00%	9.00%	9.00%
Tred-Tek (and affiliates)
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage		10.00%	7.00%	5.00%
Samsung Electronics (and affiliates)
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage		7.00%	7.00%	11.00%
Premier (and affiliates)
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage	[1]	4.00%	3.00%	3.00%

[1] Premier is a distributor with a concentration of sales to Samsung. The above percentages represent the Company's estimate of the sales activity related to Samsung that is passing through this distributor.