Balance Sheet Details - Accrued and Other Current Liabilities (Details) - USD ($) $ in Thousands		Oct. 31, 2021	Apr. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Liability for common stock exercised prior to vesting		$ 3,183	$ 5,331
Accrued general expenses		6,345	3,588
Operating lease liabilities, current		4,415	3,894
Commissions payable to a related party		18,448	3,413
Other		1,284	2,092
Accrued and other current liabilities	[1]	$ 33,675	$ 18,318

[1] Including amounts from a related party of $18,458 and $3,413 as of October 31, 2021 and April 30, 2021, respectively.