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Income Taxes (Details 2) (USD $)
12 Months Ended
Dec. 27, 2011
Dec. 28, 2010
Reconciliation of the beginning and ending liability for unrecognized tax benefits    
Balance at the beginning of the period $ 124,000 $ 404,000
Additions to tax positions related to prior years 91,000  
Reductions due to statute expiration (91,000) (280,000)
Balance at the end of the period 124,000 124,000
Accrued penalties and interest related to uncertain tax provisions   100,000
Uncertain tax positions impacting tax rate
   
Reconciliation of the beginning and ending liability for unrecognized tax benefits    
Balance at the beginning of the period 124,000 206,000
Additions to tax positions related to prior years 91,000  
Reductions due to statute expiration (91,000) (82,000)
Balance at the end of the period 124,000 124,000
Uncertain tax positions not impacting tax rate
   
Reconciliation of the beginning and ending liability for unrecognized tax benefits    
Balance at the beginning of the period   198,000
Reductions due to statute expiration   $ (198,000)