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Basis of Presentation and Summary of Significant Accounting Policies - Narrative (Details)	3 Months Ended		9 Months Ended
	Oct. 31, 2020 USD ($)	Oct. 31, 2019 USD ($)	Oct. 31, 2020 USD ($) segment	Oct. 31, 2019 USD ($)	Jan. 31, 2020 USD ($)
Concentration Risk [Line Items]
Number of operating segments \| segment			1
Number of reportable segments \| segment			1
Unbilled accounts receivable \| $	$ 3,100,000		$ 3,100,000		$ 2,000,000.0
Impairment losses \| $	$ 0	$ 0	$ 0	$ 0
On-demand arrangements \| Revenue \| Product and Service
Concentration Risk [Line Items]
Concentration risk, percentage	3.00%	4.00%	3.00%	4.00%
Professional services and other revenue \| Revenue \| Product and Service
Concentration Risk [Line Items]
Concentration risk, percentage	7.00%	5.00%	6.00%	4.00%