Condensed Consolidated Statements of Operations (USD $) In Thousands, unless otherwise specified	3 Months Ended								9 Months Ended		12 Months Ended
	May 31, 2012	Feb. 29, 2012	Nov. 30, 2011	Aug. 19, 2011	May 31, 2011	Feb. 28, 2011	Nov. 30, 2010	Aug. 31, 2010	May 31, 2012	May 31, 2012	Aug. 31, 2012	May 31, 2011	May 31, 2010
NET SALES	$ 86,019	$ 81,370	$ 83,035	$ 74,910	$ 84,555	$ 83,349	$ 81,546	$ 83,641		$ 261,814	$ 11,390	$ 333,091	$ 329,073
COST OF SALES (exclusive of amortization shown separately below)				22,955						105,698		96,175	95,349
GROSS MARGIN	58,491	52,782	40,609	51,955	59,845	59,019	58,385	59,667		156,116	4,234	236,916	233,724
OPERATING EXPENSES
Research and development				4,895						13,929		15,900	15,437
Selling and marketing				10,510						32,913		36,431	36,995
Distribution				3,952						14,333		16,508	14,831
General and administrative				38,175						38,316		37,747	36,841
Amortization expense				931						39,224		4,333	4,278
Certain litigation expenses									22,000	22,000
Total operating expenses				58,463						160,715		110,919	108,382
(LOSS) INCOME FROM OPERATIONS	11,553	9,113	(24,713)	(6,508)	27,971	33,867	31,957	32,202		(4,599)	(552)	125,997	125,342
NON-OPERATING INCOME (EXPENSE)
Interest income				142						7		706	454
Interest expense										(77,048)		(70)	(33)
Other, net				2,673						447		3,997	(551)
Total non-operating income (expense)				2,815						(76,594)		4,633	(130)
(LOSS) INCOME BEFORE INCOME TAXES				(3,693)						(81,193)		130,630	125,212
(BENEFIT) PROVISION FOR INCOME TAXES				2,681						(31,546)		41,303	42,629
NET (LOSS) INCOME	$ (7,895)	$ (9,131)	$ (30,179)	$ (6,374)	$ 24,159	$ 22,686	$ 21,063	$ 21,419		$ (49,647)	$ (2,442)	$ 89,327	$ 82,583