Segment Information - Revenue by Sales Channel (Details) - USD ($) $ in Thousands	3 Months Ended
Apr. 26, 2020	Apr. 28, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 132,702	$ 131,354
Distributor
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	103,948	81,147
Direct
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 28,754	$ 50,207

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

Name:	us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration