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Goodwill and Intangible Assets - Schedule of Components of Intangible Assets (Details) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jul. 31, 2017 | Jan. 31, 2017
Finite Lived Intangible Assets [Line Items] |  |  |
Gross Value |  | $ 15,474 | $ 15,474
Accumulated Amortization |  | (15,373) | (14,931)
Net Carrying Value |  | $ 101 | $ 543
Developed Technology |  |  |
Finite Lived Intangible Assets [Line Items] |  |  |
Weighted Average Useful Life | [1] | 2 years 6 months | 2 years 6 months
Gross Value |  | $ 14,273 | $ 14,273
Accumulated Amortization |  | $ (14,273) | (13,908)
Net Carrying Value |  |  | $ 365
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 |  | (1,100) | (1,023)
Net Carrying Value |  | $ 101 | $ 178
[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 No definition available. + Details
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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=66006027&loc=d3e16323-109275 + Details
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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=66006027&loc=d3e16323-109275 + Details
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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=66006027&loc=d3e16323-109275 + Details
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