Condensed Consolidated Statements of Operations (unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Net sales	$ 37,799	$ 30,186
Cost of goods sold	20,157	16,030
Gross profit	17,642	14,156
Operating expenses:
Research and development expenses	755	699
Selling and marketing expenses	7,306	6,586
General and administrative expenses	1,767	2,751
Total operating expenses	9,828	10,036
Operating income	7,814	4,120
Other expense:
Interest expense, net	(7)	(14)
Other income (expense), net	(5)	(1)
Income before income taxes	7,802	4,105
Income tax expense	2,417	66
Net income	$ 5,385	$ 4,039
Net income per common share - basic (in Dollars per share)	$ 0.68	$ 0.53
- diluted (in Dollars per share)	$ 0.66	$ 0.50