Basis of Presentation (Tables)

6 Months Ended

Nov. 30, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Inventory

Inventory is comprised of the following amounts at: 

(In thousands)	November 30, 2017		May 31, 2017
Raw materials	$	16,231	$	17,528
Work in process	23,199		17,951
Finished goods	233,400		242,739
	$	272,830	$	278,218