Intangible Assets, Net (Details) - USD ($) $ in Thousands	Apr. 30, 2019	Jan. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 66,225	$ 27,825
Accumulated Amortization	(9,005)	(7,707)
Net Carrying Amount	57,220	20,118
Technology patents
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	10,125	10,125
Accumulated Amortization	(6,948)	(6,572)
Net Carrying Amount	3,177	3,553
Developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	56,100	17,700
Accumulated Amortization	(2,057)	(1,135)
Net Carrying Amount	$ 54,043	$ 16,565

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

Reference 1: 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)
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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
-SubTopic 340
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004

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

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