Leases - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
Apr. 30, 2020	Apr. 30, 2019
Lessee, Lease, Description [Line Items]
Operating lease, weighted average remaining lease term	2 years 7 months 6 days
Operating lease, weighted average discount rate	3.50%
Finance lease, weighted average remaining lease term	2 years 1 month 6 days
Finance lease, weighted average discount rate	8.70%
Right-of-use assets obtained in exchange for operating lease liabilities	$ 3,185	$ 0
Operating cash flows from operating leases	392
Operating lease income	$ 1,554
Minimum \| Computer equipment
Lessee, Lease, Description [Line Items]
Finance lease, term of contract	2 years
Maximum \| Computer equipment
Lessee, Lease, Description [Line Items]
Finance lease, term of contract	3 years

Weighted average discount rate for finance lease calculated at point in time.

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Weighted average remaining lease term for finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Term of lessee's finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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- Definition

Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable.

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Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

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Weighted average discount rate for operating lease calculated at point in time.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

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