Inventories (Tables)

3 Months Ended

Aug. 31, 2014

Inventory Disclosure [Abstract]

Schedule of Inventories

Inventories are stated at lower of cost (using the first-in, first-out method) or market. As of August 31, 2014 and May 31, 2014, inventories consisted of the following:

	Aug 31, 2014		May 31, 2014
			As revised
	(in thousands)
Raw materials	$	29,696	$	24,734
Work in process	12,677		11,992
Finished goods	28,048		24,508
Inventories	$	70,421	$	61,234