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Valuation and Qualifying Accounts and Reserves
12 Months Ended
Dec. 31, 2011
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
Column A
 
Column B
   
Column C
   
Column D
   
Column E
 
Description
 
Balance at
Beginning
of Period
   
Charged to
Costs and
Expenses
   
Deduction
   
Balance at
End of
Period
 
                         
Fiscal Year Ended December 31, 2011
                       
                         
Allowance for doubtful accounts on trade receivables
  $ 1,291     $ 311     $ 147     $ 1,455  
                                 
Provision for contingencies for legal matters
  $ 638     $ 271     $ 569     $ 340  
                                 
Fiscal Year Ended January 1, 2011
                               
                                 
Allowance for doubtful accounts on trade receivables
  $ 1,188     $ 319     $ 216     $ 1,291  
                                 
Provision for contingencies for legal matters
  $ 725     $ 101     $ 188     $ 638