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Goodwill and Intangible Assets - Schedule of Components of Intangible Assets (Details) - USD ($) $ in Thousands		12 Months Ended
		Jan. 31, 2016	Jan. 31, 2015
Finite Lived Intangible Assets [Line Items]
Gross Value		$ 15,474	$ 12,325
Accumulated Amortization		(11,579)	(5,982)
Net Carrying Value		$ 3,895	$ 6,343
Developed Technology
Finite Lived Intangible Assets [Line Items]
Weighted Average Useful Life	[1]	2 years 6 months	2 years 8 months 12 days
Gross Value		$ 14,273	$ 11,124
Accumulated Amortization		(10,711)	(5,268)
Net Carrying Value		$ 3,562	$ 5,856
Trade name and other
Finite Lived Intangible Assets [Line Items]
Weighted Average Useful Life	[1]	6 years 10 months 24 days	6 years 10 months 24 days
Gross Value		$ 1,201	$ 1,201
Accumulated Amortization		(868)	(714)
Net Carrying Value		$ 333	$ 487
[1] From the date of acquisition

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- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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- Definition

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/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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