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Computation of Basic and Diluted Net Income (Loss) Per Common Share (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended
Mar. 30, 2013
Mar. 31, 2012
Numerator:    
Income (loss) from continuing operations $ 874 $ (265)
Income from discontinued operations, net of tax 0 1,870
Net income $ 874 $ 1,605
Denominator:    
Weighted average shares of common stock (basic) 8,511 8,933
Effect of dilutive preferred shares 1,000 0
Effect of dilutive stock options 261 0
Effect of dilutive contingent shares 30 0
Weighted average shares of common stock (diluted) 9,802 8,933
Basic income (loss) per share:    
Income (loss) before discontinued operations $ 0.10 $ (0.03)
Discontinued operations $ 0.00 $ 0.21
Net income $ 0.10 $ 0.18
Diluted income (loss) per share:    
Income (loss) before discontinued operations $ 0.09 $ (0.03)
Discontinued operations $ 0.00 $ 0.21
Net income $ 0.09 $ 0.18