Inventories

12 Months Ended

Apr. 30, 2018

Inventory Disclosure [Abstract]

Inventories

Inventories

The components of inventories were:

	APRIL 30
(in thousands)	2018			2017
Raw materials	$	41,728		$	18,230
Work-in-process	44,905			18,704
Finished goods	34,111			19,372
Total FIFO inventories	120,744			56,306
Reserve to adjust inventories to LIFO value	(15,943		)	(13,447		)
Total inventories	$	104,801		$	42,859

Of the total inventory of $104.8 million, $56.6 million is carried under the FIFO method and $48.2 is carried under the LIFO methods of accounting.