Consolidated Statements of Operations (Unudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Aug. 31, 2013	Aug. 31, 2012
NET SALES	$ 96,044	$ 85,154
COST OF SALES (exclusive of amortization shown separately below)	36,051	27,101
GROSS MARGIN	59,993	58,053
OPERATING EXPENSES
Research and development	8,130	4,885
Selling and marketing	14,292	12,221
Distribution	4,719	4,508
General and administrative	10,975	10,116
Amortization expense	13,207	12,381
Acquisition-related item	(1,320)
Total operating expenses	50,003	44,111
INCOME FROM OPERATIONS	9,990	13,942
NON-OPERATING EXPENSE
Interest income	9	3
Interest expense	(22,178)	(24,488)
Loss on extinguishment of debt		(6,686)
Other, net	(216)	120
Total non-operating expense	(22,385)	(31,051)
LOSS BEFORE INCOME TAXES	(12,395)	(17,109)
BENEFIT FOR INCOME TAXES	(4,635)	(6,474)
NET LOSS	$ (7,760)	$ (10,635)