Consolidated Statements of Operations (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Income Statement [Abstract]
Revenue	$ 11,293	$ 10,154
Cost of goods sold	4,294	4,046
Gross profit	6,999	6,108
Operating expenses:
Sales and marketing	2,267	2,134
Research and product development	1,866	2,008
General and administrative	1,797	1,480
Proceeds from litigation, net	0	(250)
Total operating expenses	5,930	5,372
Operating income	1,069	736
Other income (expense), net	(14)	16
Income before income taxes	1,055	752
Provision for income taxes	324	274
Net income	$ 731	$ 478
Basic earnings per common share	$ 0.08	$ 0.05
Diluted earnings per common share	$ 0.08	$ 0.05
Basic weighted average shares outstanding	9,152,859	9,098,152
Diluted weighted average shares outstanding	9,394,181	9,246,310