Inventories (Tables)

6 Months Ended

Oct. 31, 2019

Inventory, Net [Abstract]

Components of Inventories

The components of inventories were: 

	October 31,			April 30,
(in thousands)	2019			2019
Raw materials	$	50,891		$	46,054
Work-in-process	46,151			43,794
Finished goods	38,909			34,873
Total FIFO inventories	135,951			124,721
Reserve to adjust inventories to LIFO value	(16,193		)	(16,193		)
Total inventories	$	119,758		$	108,528