Lease - (Details - Supplemental cash flow information) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2021
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 4,069	$ 2,376	$ 2,972
Operating cash flows from finance leases	125	47	5
Financing cash flows from finance leases	505	162	93
Non-cash transactions:
Right-of-use assets obtained upon operating lease modifications and reassessments, net	9,267	4,554	0
Right-of-use assets obtained in exchange for operating lease obligations	0	16,093	0
Decapitalization of right-of-use assets upon impairment	89	0	0
Property and equipment obtained in exchange for finance lease obligation	$ 0	$ 2,760	$ 0