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Condensed Consolidated Statement of Operations (Unaudited) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2012
Jul. 02, 2011
Jun. 30, 2012
Jul. 02, 2011
Condensed Consolidated Statements of Operations [Abstract]        
Total revenues $ 8,445 $ 8,085 $ 16,750 $ 16,281
Cost of revenues 4,334 4,147 8,653 8,259
Gross profit 4,111 3,938 8,097 8,022
Operating expenses:        
Research and development 1,106 890 2,288 1,853
Sales and marketing 2,122 1,786 3,986 3,564
General and administrative 1,233 1,022 2,409 2,105
Total operating expenses 4,461 3,698 8,683 7,522
(Loss) income from continuing operations (350) 240 (586) 500
Legal settlement 800 800 800 800
Interest and other income (expense), net (48) 3 (75) 7
Income from continuing operations before income taxes 402 1,043 139 1,307
Provision for income tax expense 5 144 7 223
Income from continuing operations 397 899 132 1,084
(Loss) income from discontinued operations, net of tax (61) 10 (223) 391
Gain on sale of discontinued operations, net of tax 0 0 2,032 0
(Loss) income from discontinued operations, net of tax (61) 10 1,809 391
Net income $ 336 $ 909 $ 1,941 $ 1,475
Basic        
Continuing operations $ 0.04 $ 0.10 $ 0.01 $ 0.12
Discontinued operations $ 0.00 $ 0.00 $ 0.21 $ 0.04
Net income $ 0.04 $ 0.10 $ 0.22 $ 0.16
Diluted        
Continuing operations $ 0.04 $ 0.09 $ 0.01 $ 0.10
Discontinued operations $ (0.01) $ 0.00 $ 0.18 $ 0.04
Net income $ 0.03 $ 0.09 $ 0.19 $ 0.14
Weighted average shares used in computing net income per common share        
Basic 8,983 8,961 8,958 8,962
Diluted 10,286 10,231 10,270 10,223