Revenue Recognition - Summary of Revenues Disaggregated by Primary Product Type (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Oct. 27, 2018	Oct. 28, 2017	Oct. 27, 2018	Oct. 28, 2017
Disaggregation of Revenue [Line Items]
Revenue	$ 34,196	$ 28,760	$ 99,490	$ 80,701
Hardware [Member]
Disaggregation of Revenue [Line Items]
Revenue	13,096	9,394	37,989	25,285
Supplies [Member]
Disaggregation of Revenue [Line Items]
Revenue	18,107	16,608	52,690	47,734
Service and Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 2,993	$ 2,758	$ 8,811	$ 7,682

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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045

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