Summary of Significant Accounting Policies (Details - Revenue) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2021
Product Information [Line Items]
Revenues	$ 149,266	$ 119,597	$ 95,868
Manufacturing Revenue [Member]
Product Information [Line Items]
Revenues	125,416	99,282	83,678
Process Development Revenue [Member]
Product Information [Line Items]
Revenues	$ 23,850	$ 20,315	$ 12,190