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Business Combinations - Narrative (Details) - USD ($) $ in Thousands |  |  | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Mar. 18, 2019 | Jul. 13, 2018 | Apr. 30, 2019 | Jul. 31, 2018 | Jan. 31, 2020 | Jan. 31, 2019 | Jan. 31, 2018 | [1]
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Payments for business acquisition, net of cash acquired |  |  |  |  | $ 44,283 | $ 15,632 | [1] | $ 0
Purchased developed technology |  |  |  |  | 24,200 |  |  |
Goodwill |  |  |  |  | 48,023 | $ 18,089 | [2] |
Azuqua, Inc. |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Payments for business acquisition, net of cash acquired | $ 44,200 |  |  |  |  |  |  |
Cash received from acquisition | 1,100 |  |  |  |  |  |  |
Purchased developed technology |  |  |  |  | 15,700 |  |  |
Goodwill | 29,900 |  |  |  |  |  |  |
Acquisition related costs |  |  | $ 3,000 |  |  |  |  |
Azuqua, Inc. | Purchased developed technology |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Purchased developed technology | $ 15,700 |  |  |  |  |  |  |
ScaleFT, Inc. |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Payments for business acquisition, net of cash acquired |  | $ 15,600 |  |  |  |  |  |
Cash received from acquisition |  | 600 |  |  |  |  |  |
Goodwill |  | 11,800 |  |  |  |  |  |
Acquisition related costs |  |  |  | $ 1,100 |  |  |  |
ScaleFT, Inc. | Purchased developed technology |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Purchased developed technology |  | $ 4,600 |  |  |  |  |  |
ScaleFT, Inc And Azuqua, Inc. [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Deferred compensation liability, noncurrent |  |  |  |  | 10,800 |  |  |
Compensation expense |  |  |  |  | 4,400 |  |  |
Remaining deferred compensation balance |  |  |  |  | $ 4,800 |  |  |
Future weighted-average period |  |  |  |  | 1 year 7 months 6 days |  |  |
[1] | Adjusted for adoption of ASC 842. See Note 2.
[2] | Adjusted for adoption of ASC 842. See Note 2.

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