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Goodwill and Intangible Assets, net - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands | Jul. 31, 2018 | Jan. 31, 2018
--- | --- | ---
Finite-Lived Intangible Assets [Line Items] |  |
Gross | $ 24,660 | $ 18,061
Accumulated Amortization | (8,654) | (6,300)
Net | 16,006 | 11,761
Capitalized internal-use software costs |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross | 18,467 | 16,434
Accumulated Amortization | (7,441) | (5,172)
Net | 11,026 | 11,262
Purchased developed technology |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross | 5,170 | 570
Accumulated Amortization | (570) | (570)
Net | 4,600 | 0
Software licenses |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross | 1,023 | 1,057
Accumulated Amortization | (643) | (558)
Net | $ 380 | $ 499

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