Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Jul. 31, 2022	Apr. 30, 2022	Jul. 31, 2021	Apr. 30, 2021
Cash and Cash Equivalents [Abstract]
Cash and cash equivalents	$ 14,360	$ 4,433
Restricted cash	7,174	2,461
Total cash, cash equivalents and restricted cash	$ 21,534	$ 6,894	$ 5,467	$ 5,731

Amount of cash and cash equivalents restricted as to withdrawal or usage, classified as current. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Name:	us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant