Segment Information - Revenue by Sales Channel (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 25, 2020	Oct. 27, 2019	Oct. 25, 2020	Oct. 27, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 154,082	$ 141,011	$ 430,444	$ 409,511
Concentration risk, percentage	100.00%	100.00%	100.00%	100.00%
Net sales
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%	100.00%
Distributor
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 125,610	$ 107,383	$ 346,103	$ 287,642
Concentration risk, percentage	82.00%	76.00%	80.00%	70.00%
Direct
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 28,472	$ 33,628	$ 84,341	$ 121,869
Concentration risk, percentage	18.00%	24.00%	20.00%	30.00%