Goodwill and Acquired Intangible Assets - Additional Information (Details) - USD ($)	3 Months Ended
Apr. 30, 2021	Apr. 30, 2020
Finite Lived Intangible Assets [Line Items]
Goodwill impairment	$ 0	$ 0
Goodwill additions		0
Cost of Revenue
Finite Lived Intangible Assets [Line Items]
Acquired intangible assets amortization	$ 900,000	$ 0

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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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.

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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