Inventories

12 Months Ended

Apr. 30, 2022

Inventory Disclosure [Abstract]

Inventories

Inventories

The components of inventories were:

	APRIL 30
(in thousands)	2022		2021
Raw materials	$	90,451	$	63,384
Work-in-process	59,180		51,176
Finished goods	78,628		43,607
Total inventories	$	228,259	$	158,167

Effective May 1, 2021, the Company changed its accounting principle for inventory valuation from a LIFO basis to a FIFO basis. See Note A — Summary of Significant Accounting Policies for additional information on the effect of the change.