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Acquired Intangible Assets and Goodwill - Summary of Carrying Values of Intangible Assets Other than Goodwill (Details) - USD ($) $ in Thousands	Oct. 31, 2019	Jan. 31, 2019
Finite Lived Intangible Assets [Line Items]
Gross Value, Intangible Assets	$ 10,196	$ 4,783
Accumulated Amortization, Intangible Assets	(3,047)	(2,148)
Carrying Value, Intangible Assets	7,149	2,635
Customer relationships
Finite Lived Intangible Assets [Line Items]
Gross Value, Intangible Assets	6,735	902
Accumulated Amortization, Intangible Assets	(640)	(157)
Carrying Value, Intangible Assets	6,095	745
Developed technology
Finite Lived Intangible Assets [Line Items]
Gross Value, Intangible Assets	2,122	2,716
Accumulated Amortization, Intangible Assets	(1,451)	(1,121)
Carrying Value, Intangible Assets	671	1,595
Trade names
Finite Lived Intangible Assets [Line Items]
Gross Value, Intangible Assets	625	451
Accumulated Amortization, Intangible Assets	(247)	(166)
Carrying Value, Intangible Assets	378	285
Patents and licenses
Finite Lived Intangible Assets [Line Items]
Gross Value, Intangible Assets	714	714
Accumulated Amortization, Intangible Assets	(709)	(704)
Carrying Value, Intangible Assets	$ 5	$ 10

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

+ References

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-Publisher FASB
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-Topic 350
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-Section 50
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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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-Publisher FASB
-Name Accounting Standards Codification
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