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Leases - Additional Information (Details) - USD ($) | 9 Months Ended |
--- | --- | ---
Oct. 31, 2019 | Jan. 31, 2019
Lessee Lease Description [Line Items] |  |
Finance lease agreements term | 4 years |
Sublease expiration year | 2023 |
Operating leases, undiscounted future payments | $ 17,200,000 |
Finance lease,not yet commenced | 0 |
Asset retirement obligation |  | $ 0
Other Long-term Liabilities |  |
Lessee Lease Description [Line Items] |  |
Asset retirement obligation | $ 2,800,000 |
Minimum |  |
Lessee Lease Description [Line Items] |  |
Operating lease expiration year | 2020 |
Term of sublease arrangement | 31 months |
Operating lease has not yet commenced lease term | 4 years |
Maximum |  |
Lessee Lease Description [Line Items] |  |
Operating lease expiration year | 2029 |
Term of sublease arrangement | 55 months |
Operating lease has not yet commenced lease term | 5 years |

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- Definition Lessee finance lease, lease not yet commenced. + References No definition available. + Details
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- Definition Lessee, operating lease, lease not yet commenced undiscounted future payments. + References No definition available. + Details
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- Definition Non cancellable lease expiration year. + References No definition available. + Details
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- Definition Operating lease expiration year. + References No definition available. + Details
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- Definition Sublease term. + References No definition available. + Details
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- Definition The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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- Definition Term of lessee's finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980 + Details
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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 No definition available. + Details
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- Definition Term of lessee's operating lease not yet commenced, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980 + Details
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