Description of Business and Basis of Presentation - Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended		12 Months Ended
	Feb. 01, 2021	Apr. 30, 2021	Apr. 30, 2020	Jan. 31, 2021
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Decrease in accumulated deficit		$ (1,335,693)		$ (1,321,679)
Decrease in additional paid-in capital		$ 1,462,038		$ 1,474,843
ASU 2019-12
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]		true
Change in Accounting Principle, Accounting Standards Update, Adoption Date		Feb. 01, 2021
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false]		true
ASU 2020-06
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adoption Date		Feb. 01, 2021
Change in Accounting Principle, Accounting Standards Update, Early Adoption [true false]		true
Decrease in accumulated deficit	$ 600
Decrease in additional paid-in capital	(68,600)
Increase of debt, net, non current	$ 68,000
Credit Concentration Risk | Accounts Receivable
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Number of major customers		one		one
Concentration risk percentage		10.00%		10.00%
Customer Concentration Risk | Revenue
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Number of major customers		No	No
Concentration risk percentage		10.00%	10.00%
Geographic Concentration Risk | Revenue | United States
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Concentration risk percentage		69.00%	73.00%
Geographic Concentration Risk | Revenue | Japan
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Concentration risk percentage		17.00%	13.00%
Geographic Concentration Risk | Property and Equipment | United States
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Concentration risk percentage		96.00%		96.00%