Consolidated Statements of Operations (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenue	$ 11,703	$ 11,655	$ 22,996	$ 21,809
Cost of goods sold	4,839	4,562	9,133	8,608
Gross profit	6,864	7,093	13,863	13,201
Operating expenses:
Sales and marketing	2,088	2,254	4,356	4,388
Research and product development	1,843	2,029	3,709	4,037
General and administrative	1,437	1,611	3,234	3,091
Proceeds from litigation, net	0	0	0	(250)
Total operating expenses	5,368	5,894	11,299	11,266
Operating income	1,496	1,199	2,564	1,935
Other income (expense), net	47	(5)	33	11
Income before income taxes	1,543	1,194	2,597	1,946
Provision for income taxes	498	544	822	818
Net income	1,045	650	1,775	1,128
Basic earnings per common share	$ 0.11	$ 0.07	$ 0.19	$ 0.12
Diluted earnings per common share	$ 0.11	$ 0.07	$ 0.19	$ 0.12
Basic weighted average shares outstanding	9,093,461	9,107,420	9,122,996	9,102,786
Diluted weighted average shares outstanding	9,459,495	9,226,426	9,499,452	9,224,727
Unrealized (loss) on available-for-sale securities, net of tax	(87)	0	(87)	0
Comprehensive income	$ 958	$ 650	$ 1,688	$ 1,128