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Background, Basis of Presentation and Liquidity (Details Narrative) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2024	Jan. 31, 2023	Apr. 30, 2023
Accounting Policies [Abstract]
Net loss	$ 6,509	$ 6,090	$ 20,761	$ 16,786
Cash in operations			24,711	16,089
Earnout payable			500
Incurred expenses			3,200
Cash	4,900		4,900
Short-term investments	$ 4,377		$ 4,377		$ 27,790

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