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Revenue Recognition - Summary of Revenues Disaggregated by Primary Geographic Markets (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 28, 2018	Jul. 29, 2017	Jul. 28, 2018	Jul. 29, 2017
Disaggregation of Revenue [Line Items]
Revenue	$ 33,807	$ 27,483	$ 65,294	$ 51,941
United States [Member]
Disaggregation of Revenue [Line Items]
Revenue	19,977	17,249	39,210	32,932
Europe [Member]
Disaggregation of Revenue [Line Items]
Revenue	7,885	7,391	15,719	13,774
Canada [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,648	1,250	3,094	2,426
Asia [Member]
Disaggregation of Revenue [Line Items]
Revenue	2,537	797	3,976	1,087
Central and South America [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,102	652	2,156	1,484
Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 658	$ 144	$ 1,139	$ 238

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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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