Segment Information - Schedule Of Revenue From External Customers By Sales Channel (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 26, 2020	Jan. 27, 2019
Segment Reporting Information [Line Items]
Net sales	$ 595,117	$ 547,512	$ 627,196
Distributor
Segment Reporting Information [Line Items]
Net sales	490,009	392,582	442,518
Direct
Segment Reporting Information [Line Items]
Net sales	105,108	154,930	206,179
Other: Warrant Shares
Segment Reporting Information [Line Items]
Net sales	$ 0	$ 0	$ (21,501)