Summary of Significant Accounting Policies (Details - Revenue) - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2023	Jul. 31, 2022
Product Information [Line Items]
Revenues	$ 37,726	$ 36,692
Manufacturing Revenue [Member]
Product Information [Line Items]
Revenues	33,420	31,481
Process Development Revenue [Member]
Product Information [Line Items]
Revenues	$ 4,306	$ 5,211