Equity Compensation Plans (Details - Share based compensation) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2023	Oct. 31, 2022
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share based compensation	$ 2,466	$ 2,786	$ 4,809	$ 4,683
Cost of Sales [Member]
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share based compensation	1,107	1,045	2,061	1,732
Selling, General and Administrative Expenses [Member]
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share based compensation	$ 1,359	$ 1,741	$ 2,748	$ 2,951