XML 80 R46.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Fair Value Measurements Schedule of Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands | Jan. 31, 2020 | Jan. 31, 2019
--- | --- | ---
Assets: |  |
Cash equivalents, fair value | $ 436,580 | $ 250,834
Short term investments, fair value | 882,976 | 265,374
Total cash equivalents and short-term investments | 1,319,556 | 516,208
Level 1 |  |
Assets: |  |
Cash equivalents, fair value | 416,584 | 247,426
Short term investments, fair value | 0 | 0
Total cash equivalents and short-term investments | 416,584 | 247,426
Level 2 |  |
Assets: |  |
Cash equivalents, fair value | 19,996 | 3,408
Short term investments, fair value | 882,976 | 265,374
Total cash equivalents and short-term investments | 902,972 | 268,782
Level 3 |  |
Assets: |  |
Cash equivalents, fair value | 0 | 0
Short term investments, fair value | 0 | 0
Total cash equivalents and short-term investments | 0 | 0
U.S. treasury securities |  |
Assets: |  |
Short term investments, fair value | 576,598 | 195,897
U.S. treasury securities | Level 1 |  |
Assets: |  |
Short term investments, fair value | 0 | 0
U.S. treasury securities | Level 2 |  |
Assets: |  |
Short term investments, fair value | 576,598 | 195,897
U.S. treasury securities | Level 3 |  |
Assets: |  |
Short term investments, fair value | 0 | 0
Corporate debt securities |  |
Assets: |  |
Short term investments, fair value | 306,378 | 69,477
Corporate debt securities | Level 1 |  |
Assets: |  |
Short term investments, fair value | 0 | 0
Corporate debt securities | Level 2 |  |
Assets: |  |
Short term investments, fair value | 306,378 | 69,477
Corporate debt securities | Level 3 |  |
Assets: |  |
Short term investments, fair value | 0 | 0
Money market funds |  |
Assets: |  |
Cash equivalents, fair value | 416,584 | 247,426
Money market funds | Level 1 |  |
Assets: |  |
Cash equivalents, fair value | 416,584 | 247,426
Money market funds | Level 2 |  |
Assets: |  |
Cash equivalents, fair value | 0 | 0
Money market funds | Level 3 |  |
Assets: |  |
Cash equivalents, fair value | 0 | 0
U.S. treasury securities |  |
Assets: |  |
Cash equivalents, fair value | 19,996 |
U.S. treasury securities | Level 1 |  |
Assets: |  |
Cash equivalents, fair value | 0 |
U.S. treasury securities | Level 2 |  |
Assets: |  |
Cash equivalents, fair value | 19,996 |
U.S. treasury securities | Level 3 |  |
Assets: |  |
Cash equivalents, fair value | $ 0 |
Corporate debt securities |  |
Assets: |  |
Cash equivalents, fair value |  | 3,408
Corporate debt securities | Level 1 |  |
Assets: |  |
Cash equivalents, fair value |  | 0
Corporate debt securities | Level 2 |  |
Assets: |  |
Cash equivalents, fair value |  | 3,408
Corporate debt securities | Level 3 |  |
Assets: |  |
Cash equivalents, fair value |  | $ 0

X
- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
Name: | us-gaap_AssetsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_AssetsFairValueDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
Name: | us-gaap_CashAndCashEquivalentsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
Name: | us-gaap_InvestmentsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CashAndCashEquivalentsAxis=us-gaap_MoneyMarketFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CashAndCashEquivalentsAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CashAndCashEquivalentsAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |