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Business Combinations - Narrative (Details) - USD ($) $ in Thousands |  |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | ---
Jul. 13, 2018 | Feb. 17, 2017 | Jul. 31, 2018 | Jul. 31, 2018 | Jul. 31, 2017 | [1] | Jan. 31, 2018 | [2]
Business Acquisition [Line Items] |  |  |  |  |  |
Payments for business acquisition, net of cash acquired |  |  |  | $ 15,638 | $ 0 |
Goodwill |  |  | $ 18,095 | $ 18,095 |  | $ 6,282
Stormpath Inc. |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Total purchase price |  | $ 3,700 |  |  |  |
Shares included in total consideration (in shares) |  | 200,000 |  |  |  |
Stormpath Inc. | Restricted common stock |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Incremental shares issued (in shares) |  | 800,000 |  |  |  |
Incremental shares issued |  | $ 8,600 |  |  |  |
Stormpath Inc. | Stormpath Investors |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Total purchase price |  | 2,200 |  |  |  |
Stormpath Inc. | Stormpath Workforce |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Total purchase price |  | 1,500 |  |  |  |
Incremental shares issued |  | $ 9,100 |  |  |  |
ScaleFT, Inc. |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Payments for business acquisition, net of cash acquired | $ 15,600 |  |  |  |  |
Cash acquired from acquisition | 600 |  |  |  |  |
Purchased developed technology | 4,600 |  |  |  |  |
Goodwill | 11,800 |  |  |  |  |
Acquisition related costs |  |  | $ 1,100 |  |  |
ScaleFT, Inc. | Purchased developed technology |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Purchased developed technology | $ 4,600 |  |  |  |  |
Useful life of acquired intangible assets | 3 years |  |  |  |  |
[1] | See Note 2 for a summary of adjustments.
[2] | See Note 2 for a summary of adjustments.

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e1043-128460 + Details
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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 + Details
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