Note 5 - Accounts Receivable, Net, Contract Asset and Contract Liability - Accounts Receivable, Net, Contract Asset and Contract Liability (Details) - USD ($) $ in Thousands	Jan. 31, 2024	Apr. 30, 2023
Accounts Receivable, net	$ 6,140	$ 3,793
Contract Asset	2,134	1,893
Contract Liability	$ 5,673	$ 6,031