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Background, Basis of Presentation and Liquidity (Details Narrative) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2025	Jan. 31, 2024	Apr. 30, 2024
Accounting Policies [Abstract]
Net loss	$ 6,720	$ 6,509	$ 15,085	$ 20,761
Cash used in operations			14,628	$ 24,711
Current cash, cash equivalents, and restricted cash	$ 10,180		$ 10,180		$ 3,305

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Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. 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.

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Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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