Balance Sheet Details - Accrued and Other Current Liabilities (Details) - USD ($) $ in Thousands		Jan. 31, 2022	Apr. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Liability for common stock exercised prior to vesting		$ 2,449	$ 5,331
Accrued general expenses		5,154	3,588
Operating lease liabilities, current		3,246	3,894
Commissions payable to a related party		18,534	3,413
Other		4,215	2,092
Accrued and other current liabilities	[1]	$ 33,598	$ 18,318

[1] Including amounts from a related party of $18,534 and $3,413 as of January 31, 2022 and April 30, 2021, respectively.