Basis of Presentation (Tables)

9 Months Ended

Feb. 28, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Inventory

Inventory is comprised of the following amounts at: 

(In thousands)	February 28, 2018		May 31, 2017
Raw materials	$	18,821	$	17,528
Work in process	25,135		17,951
Finished goods	230,863		242,739
	$	274,819	$	278,218