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NET INCOME (LOSS) PER SHARE (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended
Mar. 28, 2014
Mar. 29, 2013
Earnings Per Share [Abstract]    
Net income (loss) $ 1,656 $ (1,076)
Weighted average number of common shares used in basic net income (loss) per common share 40,572,000 39,784,000
Dilutive effect of outstanding stock options and non-vested restricted stock 319,000 0
Weighted average number of common shares used in diluted net income (loss) per common share 40,891,000 39,784,000
Net income (loss) per common share:    
Basic (in dollars per share) $ 0.04 $ (0.03)
Diluted (in dollars per share) $ 0.04 $ (0.03)
Anti-dilutive shares 0 300,000