Condensed Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Apr. 02, 2011
Condensed Consolidated Statements Of Operations [Abstract]
Total revenues	$ 8,305	$ 8,196
Cost of revenues	4,319	4,112
Gross profit	3,986	4,084
Operating expenses:
Research and development	1,182	963
Sales and marketing	1,864	1,778
General and administrative	1,176	1,083
Total operating expenses	4,222	3,824
(Loss) income from continuing operations	(236)	260
Other (expense) income, net	(27)	4
(Loss) income from continuing operations before income taxes	(263)	264
Provision for income tax expense	2	79
(Loss) income from continuing operations	(265)	185
(Loss) income from discontinued operations, net of tax	(162)	381
Gain on sale of discontinued operations, net of tax	2,032	0
Income from discontinued operations, net of tax	1,870	381
Net income	$ 1,605	$ 566
Net (loss) income per share:
Basic - Continuing operations	$ (0.03)	$ 0.02
Basic - Discontinued operations	$ 0.21	$ 0.04
Net income	$ 0.18	$ 0.06
Diluted - Continuing operations	$ (0.03)	$ 0.02
Diluted - Discontinued operations	$ 0.21	$ 0.04
Net income	$ 0.18	$ 0.06
Weighted average shares used in computing net income per common share
Basic	8,933	8,964
Diluted	8,933	10,215