Inventories (Tables)

6 Months Ended

Nov. 30, 2016

Inventory Disclosure [Abstract]

Schedule of Inventories

Total inventories consist of the following:

	November 30, 2016		May 31, 2016
	(Unaudited)
	(Dollars in thousands)
Raw materials	$	8,302	$	7,198
Work in process		3,364		3,447
Finished goods		290		736
	$	11,956	$	11,381