Inventories

9 Months Ended

Jan. 31, 2020

Inventory Disclosure [Abstract]

Inventories

Components of inventories are as follows:

	January 31, 2020		April 30, 2019
Raw materials	$	105,926	$	112,499
Work-in-process		23,952		32,882
Finished goods		16,234		17,297
	$	146,112	$	162,678