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EMPLOYEE STOCK PLANS - Restricted Stock Units - (Details) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jul. 01, 2012
Jun. 30, 2013
Jul. 01, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Allocated Share-based Compensation Expense $ 346,000 $ 352,000 $ 723,000 $ 757,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]        
Time-based RSUs vesting percentage on each anniversary of the vesting commencement date     25.00%  
Restricted Stock Units
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Stock Options 400,000   400,000  
Allocated Share-based Compensation Expense $ 32,000 $ 4,000 $ 47,000 $ 15,000
Number of Shares        
Outstanding at December 31, 2012     32,000  
Granted (in shares)     375,000  
Released (in shares)     (8,000)  
Expired (in shares)     0  
Weighted Average Grant Date Fair Value, Outstanding at December 31, 2012 (in usd per share)     $ 1.28  
Outstanding at June 30, 2013 399,000   399,000  
Weighted Average Grant Date Fair Value        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value     $ 1.37  
Weighted Average Grant Date Fair Value, Released (in usd per share)     $ 1.03  
Weighted Average Grant Date Fair Value, Expired (in usd per share)     $ 0.00  
Weighted Average Grant Date Fair Value, Outstanding at June 30, 2013 (in usd per share) $ 1.36   $ 1.36  
Time-based Restricted Stock Units
       
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]        
Common stock equivalent shares     1.75