Note 4 - Inventories (Tables)

9 Months Ended

Feb. 28, 2014

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

	As of
	February 28, 2014		May 31, 2013
Raw materials and supplies	$	16,385		14,880
Work in process		10,957		8,356
Finished goods		23,766		22,705
	$	51,108		45,941