Equity Incentive Plans - Recognized Stock-based Compensation Expense (Details) - 2011 Equity Incentive Plan (the Plan) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 33,749	$ 23,847	$ 21,801
Sales and marketing
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	10,936	10,770	7,387
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	9,095	6,339	6,519
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	11,218	5,637	7,492
Interest expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	444	190	30
Subscription | Cost of revenue
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	1,213	507	219
Professional services and other | Cost of revenue
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 843	$ 404	$ 154