Balance Sheet Components - Components of Acquired Intangible Assets (Details) - USD ($) $ in Thousands	Jul. 31, 2020	Jan. 31, 2020
Finite Lived Intangible Assets [Line Items]
Total intangible assets	$ 6,165	$ 6,818
Customer relationships
Finite Lived Intangible Assets [Line Items]
Total intangible assets	5,334	5,841
Developed technology
Finite Lived Intangible Assets [Line Items]
Total intangible assets	521	622
Trade names
Finite Lived Intangible Assets [Line Items]
Total intangible assets	$ 310	$ 355

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 926
-SubTopic 20
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=120154696&loc=d3e54445-107959

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

Name:	us-gaap_FiniteLivedIntangibleAssetsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant