Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended
	Feb. 28, 2014	Feb. 28, 2013	Aug. 31, 2012	Feb. 28, 2014	May 31, 2013	Feb. 28, 2013
NET SALES	$ 90,979	$ 86,192		$ 287,226		$ 253,402
COST OF SALES (exclusive of amortization shown separately below)	32,359	29,997		103,092		84,264
GROSS MARGIN	58,620	56,195		184,134		169,138
OPERATING EXPENSES
Research and development	6,738	4,854		22,178		14,276
Selling and marketing	14,295	11,056		43,757		36,218
Distribution	5,068	4,588		14,624		13,817
General and administrative	10,310	10,446		29,534		31,375
Amortization expense	13,225	12,407		39,647		37,192
Acquisition-related items				(4,638)		0
Impairment loss	150			180
Loss on disposition and retirement of fixed assets	150			180		1,175
Total operating expenses	49,786	43,351		145,282		134,053
INCOME FROM OPERATIONS	8,834	12,844		38,852		35,085
NON-OPERATING INCOME (EXPENSE)
Interest income	16	12		28		22
Interest expense	(21,900)	(21,952)		(66,172)		(68,691)
Loss on extinguishment of debt		(2,425)	(6,700)		(5,625)	(9,111)
Other, net	(108)	(143)		(301)		(265)
Total non-operating net expense	(21,992)	(24,508)		(66,445)		(78,045)
LOSS BEFORE INCOME TAXES	(13,158)	(11,664)		(27,593)		(42,960)
BENEFIT FOR INCOME TAXES	(5,803)	(5,751)		(11,691)		(16,013)
NET LOSS	$ (7,355)	$ (5,913)		$ (15,902)		$ (26,947)