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UNAUDITED QUARTERLY FINANCIAL DATA (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 28, 2013
Sep. 28, 2013
Jun. 29, 2013
Mar. 30, 2013
Dec. 29, 2012
Sep. 29, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 28, 2013
Dec. 29, 2012
UNAUDITED QUARTERLY FINANCIAL DATA                    
Sales $ 33,606 $ 28,865 $ 32,857 $ 26,213 $ 29,919 $ 29,166 $ 29,747 $ 24,396 $ 121,541 $ 113,228
Gross profit 3,895 5,100 6,868 4,593 2,734 5,530 5,491 4,823    
Depreciation, depletion and amortization 700 669 844 815 689 825 1,045 1,068 3,028 3,627
Net (loss) income:                    
Continuing operations         5,154 (191) (502) (1,053) (859) 3,408
Discontinued operations         (10)   (9)     (19)
Net (loss) income $ (1) $ (242) $ 187 $ (803) $ 5,144 $ (191) $ (511) $ (1,053) $ (859) $ 3,389
Basic and Diluted (loss) income per share                    
Continuing operations (in dollars per share)         $ 3.15 $ (0.11) $ (0.31) $ (0.64) $ (0.52) $ 2.08
Discontinued operation (in dollars per share)         $ (0.01)   $ (0.01)     $ (0.01)
Net (loss) income per basic and diluted share (in dollars per share) $ 0.00 $ (0.15) $ (0.11) $ (0.49) $ 3.14 $ (0.11) $ (0.32) $ (0.64) $ (0.52) $ 2.07