Derivative Instruments and Hedging Activities (Details) - Foreign currency derivative contracts - Not Designated as Hedging Instrument $ in Thousands	3 Months Ended
Apr. 30, 2020 USD ($)
Derivative [Line Items]
Derivative, notional amount	$ 12,300
Other Income (Expense)
Derivative [Line Items]
Derivative instruments not designated as hedging instruments, loss	$ 500

Amount of realized and unrealized loss of derivative instruments not designated or qualifying as hedging instruments.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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