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Revenue Recognition - Summary of Revenues Disaggregated by Primary Geographic Markets (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
United States [Member]
Disaggregation of Revenue [Line Items]
Revenue	21,542	18,116	60,752	51,048
Europe [Member]
Disaggregation of Revenue [Line Items]
Revenue	7,573	6,771	23,292	20,545
Canada [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,560	1,428	4,653	3,854
Asia [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,860	1,183	5,836	2,270
Central and South America [Member]
Disaggregation of Revenue [Line Items]
Revenue	921	1,045	3,078	2,529
Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 740	$ 217	$ 1,879	$ 455

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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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.

+ References

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

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