Equity Incentive Plans - Summary of Stock-based Compensation Expense Recognized in Consolidated Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2021	Oct. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense, net of amounts capitalized	$ 29,982	$ 21,487	$ 60,160	$ 40,078
Capitalized stock-based compensation expense	54	0	82	0
Total stock-based compensation expense	30,036	21,487	60,242	40,078
Cost of revenue—cost of subscription—self-managed and SaaS
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense, net of amounts capitalized	2,064	1,860	4,198	3,226
Cost of revenue—professional services
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense, net of amounts capitalized	1,292	976	2,867	1,928
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense, net of amounts capitalized	13,658	7,663	25,755	14,793
Sales and marketing
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense, net of amounts capitalized	8,403	7,955	18,253	14,147
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense, net of amounts capitalized	$ 4,565	$ 3,033	$ 9,087	$ 5,984