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Goodwill and Intangible Assets, net - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands | Apr. 30, 2017 | Jan. 31, 2017
--- | --- | ---
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets, gross | $ 13,868 | $ 12,522
Intangible assets, accumulated amortization | (4,033) | (3,367)
Intangible assets, net | 9,835 | 9,155
Capitalized internal-use software costs |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets, gross | 12,275 | 10,859
Intangible assets, accumulated amortization | (3,116) | (2,487)
Intangible assets, net | 9,159 | 8,372
Software licenses |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets, gross | 1,023 | 1,093
Intangible assets, accumulated amortization | (347) | (314)
Intangible assets, net | 676 | 779
Purchased developed technology |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets, gross | 570 | 570
Intangible assets, accumulated amortization | (570) | (566)
Intangible assets, net | $ 0 | $ 4

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