Debt (Details - Interest expense) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2023	Oct. 31, 2022
Short-Term Debt [Line Items]
Amortization of issuance costs			$ 639	$ 520
Total interest expense associated with Convertible Notes	$ 827	$ 877	1,652	1,718
Convertible Notes [Member]
Short-Term Debt [Line Items]
Contractual interest expense	453	585	911	1,132
Amortization of issuance costs	266	260	531	520
Total interest expense associated with Convertible Notes	$ 719	$ 845	$ 1,442	$ 1,652