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EMPLOYEE STOCK PLANS - Restricted Stock Units - (Details) (USD $)
3 Months Ended 6 Months Ended
Jul. 01, 2012
Apr. 01, 2012
Jul. 03, 2011
Jul. 01, 2012
Jul. 03, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Allocated Share-based Compensation Expense $ 352,000   $ 675,000 $ 757,000 $ 1,403,000
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]          
Allocated Share-based Compensation Expense 4,000   30,000 15,000 68,000
Number of Shares          
Outstanding at December 31, 2011   246,000   246,000  
Granted (in shares)       0  
Released (in shares)       (13,000)  
Expired (in shares)       (228,000)  
Outstanding at July 1, 2012 5,000     5,000  
Weighted Average Grant Date Fair Value          
Weighted Average Grant Date Fair Value, Outstanding at December 31, 2011 (in usd per share)   3.50   $ 3.50  
Weighted Average Grant Date Fair Value, Released (in usd per share)       $ 5.80  
Weighted Average Grant Date Fair Value, Expired (in usd per share)       $ 3.32  
Weighted Average Grant Date Fair Value, Outstanding at July 1, 2012 (in usd per share) $ 5.83     $ 5.83  
Time-based Restricted Stock Units
         
Number of Shares          
Outstanding at July 1, 2012 5,000     5,000  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]          
Common stock equivalent shares       1.75  
Performance-based Restricted Stock Units
         
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Allocated Share-based Compensation Expense $ 0   $ 0 $ 0 $ 0
Number of Shares          
Outstanding at December 31, 2011   200,000   200,000  
Expired (in shares)   (200,000)