Note 4 - Inventories (Tables)

6 Months Ended

Nov. 30, 2012

Schedule of Inventory, Current [Table Text Block]

	November 30, 2012		May 31, 2012
Raw materials and supplies	$	11,115	$	10,228
Work in process		4,401		3,550
Finished goods		21,245		19,592
	$	36,761	$	33,370