Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Statement Condensed Consolidated Statements Of Operations Unaudited [Line Items]
Total revenues	$ 9,526	$ 7,881	$ 27,675	$ 24,631
Cost of revenues	4,802	3,970	14,238	12,623
Gross profit	4,724	3,911	13,437	12,008
Operating expenses:
Research and development	923	1,006	2,803	3,294
Sales and marketing	1,869	1,875	5,340	5,861
General and administrative	1,267	1,609	3,690	4,018
Proceeds from demutualization of insurance carrier	0	0	(473)	0
Total operating expenses	4,059	4,490	11,360	13,173
Income (loss) from continuing operations	665	(579)	2,077	(1,165)
Legal settlement	0	0	0	800
Interest and other expense, net	(85)	(117)	(200)	(192)
Income (loss) from continuing operations before provision for (benefit from) income taxes	580	(696)	1,877	(557)
Provision for (benefit from) income taxes	50	(141)	58	(134)
Income (loss) from continuing operations	530	(555)	1,819	(423)
Loss from discontinued operations, net of tax	0	(190)	0	(413)
Gain on sale of discontinued operations, net of tax	0	0	0	2,032
(Loss) income from discontinued operations, net of tax	0	(190)	0	1,619
Net income (loss)	$ 530	$ (745)	$ 1,819	$ 1,196
Basic
Continuing operations	$ 0.05	$ (0.06)	$ 0.20	$ (0.05)
Discontinued operations	$ 0.00	$ (0.02)	$ 0.00	$ 0.18
Net income (loss)	$ 0.05	$ (0.08)	$ 0.20	$ 0.13
Diluted
Continuing operations	$ 0.05	$ (0.06)	$ 0.18	$ (0.05)
Discontinued operations	$ 0.00	$ (0.02)	$ 0.00	$ 0.18
Net income (loss)	$ 0.05	$ (0.08)	$ 0.18	$ 0.13
Weighted average shares used in computing net income (loss) per common share
Basic	9,796	9,005	9,044	8,974
Diluted	10,177	9,005	9,995	8,974