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Revenue Recognition - Summary of Revenues Disaggregated by Primary Geographic Markets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017
Disaggregation of Revenue [Line Items]
Total Revenue	$ 136,657	$ 113,401	$ 98,448
United States [Member]
Disaggregation of Revenue [Line Items]
Total Revenue	83,668	69,795	69,850
Europe [Member]
Disaggregation of Revenue [Line Items]
Total Revenue	31,574	29,948	18,848
Asia [Member]
Disaggregation of Revenue [Line Items]
Total Revenue	8,207	3,808	1,664
Canada [Member]
Disaggregation of Revenue [Line Items]
Total Revenue	6,692	5,373	5,008
Central and South America [Member]
Disaggregation of Revenue [Line Items]
Total Revenue	4,147	3,402	3,053
Other [Member]
Disaggregation of Revenue [Line Items]
Total Revenue	$ 2,369	$ 1,075	$ 25

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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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- Definition

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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