Supplemental Financial Information - Schedule of Prepaid Expense and Other Current Assets (Details) - USD ($) $ in Thousands	Apr. 30, 2022	Apr. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Prepaid expenses	$ 4,477	$ 1,313
Advances to suppliers	188	6,276
Other current assets	1,258	1,142
Prepaid expenses and other current assets	$ 5,923	$ 8,731

Amount of asset related to consideration paid in advance for costs that provide economic benefits within a future period of one year or the normal operating cycle, if longer.

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Name:	us-gaap_PrepaidExpenseCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant