Equity Compensation Plans (Details - Share based compensation) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2023	Jan. 31, 2022
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share based compensation	$ 2,744	$ 2,111	$ 7,427	$ 5,352
Cost of Sales [Member]
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share based compensation	1,017	694	2,749	1,855
Selling General And Administrative [Member]
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share based compensation	$ 1,727	$ 1,417	$ 4,678	$ 3,497