Summary of Business and Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands	Apr. 30, 2020	Jan. 31, 2020
Summary Of Business And Accounting Policies [Line Items]
Unbilled accounts receivable	$ 37,269	$ 32,817
Professional services and other
Summary Of Business And Accounting Policies [Line Items]
Unbilled accounts receivable	21,000	18,000
Subscription services
Summary Of Business And Accounting Policies [Line Items]
Unbilled accounts receivable	$ 17,000	$ 15,000