Condensed Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
REVENUES:
Net sales	$ 81,266	$ 76,317	$ 233,788	$ 225,316
Other	139	141	409	409
TOTAL REVENUE	81,405	76,458	234,197	225,725
COST OF GOODS SOLD	40,710	40,884	119,455	119,324
Gross profit	40,695	35,574	114,742	106,401
OPERATING EXPENSES:
Selling, general and administrative	20,177	20,411	63,873	63,004
Research and development	2,988	1,877	8,410	6,420
Legal settlement	0	0	0	(2,500)
Total operating expenses	23,165	22,288	72,283	66,924
Income from operations	17,530	13,286	42,459	39,477
OTHER INCOME(EXPENSE)	158	132	438	966
Income before income taxes	17,688	13,418	42,897	40,443
PROVISION FOR INCOME TAXES	(5,500)	(4,157)	(13,959)	(13,616)
NET INCOME	$ 12,188	$ 9,261	$ 28,938	$ 26,827
NET INCOME PER SHARE
Basic (in dollars per share)	$ 0.85	$ 0.66	$ 2.04	$ 1.94
Diluted (in dollars per share)	$ 0.82	$ 0.65	$ 1.98	$ 1.89
WEIGHTED AVERAGE NUMBER OF SHARES
Basic (in shares)	14,321	13,932	14,153	13,826
Diluted (in shares)	14,826	14,184	14,613	14,169