Condensed Consolidated Statements of Operations (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
Net sales	$ 38,052	$ 37,402	$ 128,897	$ 120,427
Cost of sales	19,511	21,605	69,283	68,000
Gross profit	18,541	15,797	59,614	52,427
Operating expenses:
Selling and marketing	12,434	11,517	41,057	38,601
General and administrative	4,371	4,134	12,672	13,103
Research and development	1,038	859	2,957	2,336
Total operating expenses	17,843	16,510	56,686	54,040
Operating income (loss)	698	(713)	2,928	(1,613)
Other income (expense):
Interest income	3	5	16	14
Interest expense	(9)	(116)	66	(348)
Other	(101)	(65)	(187)	17
Total other income (expense)	(107)	(176)	(105)	(317)
Income (loss) from continuing operations before income taxes	591	(889)	2,823	(1,930)
Income tax expense (benefit)	(625)	(1,170)	(554)	(1,136)
Income (loss) from continuing operations	1,216	281	3,377	(794)
Discontinued operation:
Income (loss) from discontinued operation before income taxes	(281)	(19)	(167)	(509)
Income tax expense (benefit) of discontinued operation	(16)	354	(99)	451
Income (loss) from discontinued operation	(265)	(373)	(68)	(960)
Net income (loss)	$ 951	$ (92)	$ 3,309	$ (1,754)
Income (loss) per share from continuing operations:
Basic	$ 0.04	$ 0.01	$ 0.11	$ (0.03)
Diluted	$ 0.04	$ 0.01	$ 0.11	$ (0.03)
Income (loss) per share from discontinued operation:
Basic	$ (0.01)	$ (0.01)	$ 0.00	$ (0.03)
Diluted	$ (0.01)	$ (0.01)	$ 0.00	$ (0.03)
Net income (loss) per share:
Basic	$ 0.03	$ 0.00	$ 0.11	$ (0.06)
Diluted	$ 0.03	$ 0.00	$ 0.11	$ (0.06)
Weighted average shares outstanding:
Basic	30,892	30,747	30,892	30,746
Diluted	30,943	30,747	31,010	30,746