Inventories

12 Months Ended

Apr. 30, 2017

Inventory Disclosure [Abstract]

Inventories

Inventories

The components of inventories were:

	APRIL 30
(in thousands)	2017			2016
Raw materials	$	18,230		$	17,634
Work-in-process	18,704			18,414
Finished goods	19,372			17,475
Total FIFO inventories	56,306			53,523
Reserve to adjust inventories to LIFO value	(13,447		)	(14,204		)
Total LIFO inventories	$	42,859		$	39,319