SEGMENT INFORMATION (Details) - Revenue from External Customers by Products and Services - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2022	Oct. 31, 2021	Oct. 31, 2022	Oct. 31, 2021
Revenue from External Customer [Line Items]
Revenue	$ 8,949	$ 12,936	$ 17,153	$ 25,890
Satellite Revenue [Member]
Revenue from External Customer [Line Items]
Revenue	4,333	6,603	7,808	13,343
Government Non-Space Revenue [Member]
Revenue from External Customer [Line Items]
Revenue	3,918	5,099	7,983	10,590
Other Commercial & Industrial Revenue [Member]
Revenue from External Customer [Line Items]
Revenue	$ 698	$ 1,234	$ 1,362	$ 1,957