INVENTORIES (Tables)

9 Months Ended

Jan. 31, 2021

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories, which are reported at the lower of cost and net realizable value, consisted of the following:

	January 31, 2021		April 30, 2020
	(In thousands)
Raw Materials and Component Parts	$	12,647	$	15,470
Work in Progress		7,377		6,104
Finished Goods		950		1,384
	$	20,974	$	22,958