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Income Taxes - Additional Information (Detail) (USD $)
 3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 25, 2011
Jun. 30, 2012
Jun. 25, 2011
Income Taxes [Line Items]        
State income and foreign tax expenses $ 549,000 $ 97,500 $ 865,000 $ 195,500
Net operating loss carryforwards available for tax purposes 15,800,000   15,800,000  
Net operating loss carryforwards, expiration date     expiring through 2021  
Unrecorded benefits from stock award     13,100,000  
Alternative Minimum And State Income Tax
        
Income Taxes [Line Items]        
State income and foreign tax expenses $ 549,000 $ 98,000 $ 865,000 $ 196,000
Minimum
        
Income Taxes [Line Items]        
State income tax returns examination period     3 years  
Maximum
        
Income Taxes [Line Items]        
State income tax returns examination period     5 years  
The state impact of any federal changes, subject to examination by various states (in years)     1 year