Inventories (Tables)

12 Months Ended

Apr. 30, 2020

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories, net at April 30, 2020 and 2019, respectively, consisted of the following (in thousands):

	2020		2019
Raw Materials and Component Parts	$	15,470	$	11,600
Work in Progress		6,104		8,896
Finished Goods		1,384		2,860
	$	22,958	$	23,356