Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenue	$ 35,230	$ 32,127	$ 103,534	$ 94,763
Cost of products sold	9,624	8,683	28,112	26,923
Gross profit	25,606	23,444	75,422	67,840
Operating expenses:
Selling, general and administrative	20,324	17,716	61,287	52,707
Research, development and other technology	4,181	4,729	12,134	13,663
Litigation charge	0	596	0	596
Total operating expenses	24,505	23,041	73,421	66,966
Operating income	1,101	403	2,001	874
Other income (expense):
Litigation related interest expense	0	(230)	0	(230)
Interest income, net	2	17	8	68
Foreign currency transaction gain (loss)	34	(2)	(7)	14
Other, net	10	1	10	51
Total other income (expense)	46	(214)	11	(97)
Income before income taxes	1,147	189	2,012	777
Income tax expense	242	80	459	238
Net income	905	109	1,553	539
Net income per share —
Basic	$ 0.03	$ 0.00	$ 0.05	$ 0.02
Diluted	$ 0.03	$ 0.00	$ 0.04	$ 0.02
Other comprehensive income (loss), net of tax
Foreign currency translation adjustments, net of tax	118	(403)	(37)	(78)
Comprehensive income (loss), net of tax	$ 1,023	$ (294)	$ 1,516	$ 461
Weighted average common shares outstanding —
Basic	34,548,777	33,546,412	34,267,597	33,370,254
Diluted	35,945,453	34,390,829	35,550,565	34,271,029