Note 4. Inventories (Detail) - Inventory (USD $) In Thousands, unless otherwise specified	Nov. 30, 2011	May 31, 2011
Total Inventory	$ 37,426	$ 32,914
Successor [Member]
Raw materials and supplies	10,045
Work in process	5,469
Finished goods	21,912
Total Inventory	37,426
Predecessor [Member]
Raw materials and supplies		9,506
Work in process		4,012
Finished goods		19,396
Total Inventory		$ 32,914