Segment Information - Long-lived Assets by Region (Details) - USD ($) $ in Thousands	Jan. 31, 2021	Jan. 26, 2020
Geographic Information And Concentration Of Risk [Line Items]
Long-lived assets	$ 130,934	$ 124,418
United States
Geographic Information And Concentration Of Risk [Line Items]
Long-lived assets	61,502	54,357
Rest of North America [Member]
Geographic Information And Concentration Of Risk [Line Items]
Long-lived assets	35,216	32,559
Europe
Geographic Information And Concentration Of Risk [Line Items]
Long-lived assets	11,339	11,369
Asia and All Others
Geographic Information And Concentration Of Risk [Line Items]
Long-lived assets	$ 22,877	$ 26,133