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v3.20.1

Balance Sheet Components - Schedule of Other Long-Term Assets (Parenthetical) (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Apr. 30, 2020 | Jan. 31, 2020
Property Plant And Equipment [Line Items] |  |
Capitalized stock-based compensation expenses | $ 5.6 | $ 5.0
Accumulated amortization of capitalized software costs | 3.6 | $ 1.7
Amortization expense related to capitalized software | $ 1.9 |
On-premises software | Maximum |  |
Property Plant And Equipment [Line Items] |  |
Finite-lived intangible asset, estimated useful life | 4 years |
On-premises software | Minimum |  |
Property Plant And Equipment [Line Items] |  |
Finite-lived intangible asset, estimated useful life | 3 years |

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- Definition For each balance sheet presented, the amount of accumulated amortization for capitalized computer software costs. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 + Details
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