Segment Information - Long-lived Assets by Region (Details) - USD ($) $ in Thousands	Jan. 27, 2019	Jan. 28, 2018
Geographic Information And Concentration Of Risk [Line Items]
Long-lived assets	$ 118,488	$ 124,606
United States
Geographic Information And Concentration Of Risk [Line Items]
Long-lived assets	46,285	48,289
Rest of North America [Member]
Geographic Information And Concentration Of Risk [Line Items]
Long-lived assets	34,493	34,941
Europe
Geographic Information And Concentration Of Risk [Line Items]
Long-lived assets	8,839	9,752
Asia and All Others
Geographic Information And Concentration Of Risk [Line Items]
Long-lived assets	$ 28,871	$ 31,624