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Note 10. Stock Based Compensation (Detail) (USD $)
0 Months Ended 3 Months Ended 6 Months Ended 54 Months Ended
Jun. 25, 2012
Jun. 25, 2010
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Dec. 31, 2007
Dec. 31, 2006
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 2,250,000 2,000,000 6,013,334   6,013,334   6,013,334 1,000,000 666,667
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized 4,250,000 1,000,000              
Share-based Compensation (in Dollars)     $ 269,756 $ 233,099 $ 557,021 $ 559,976      
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized (in Dollars)     $ 2,200,000   $ 2,200,000   $ 2,200,000    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition         2 years 36 days        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)           $ 3.14      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)         $ 2.09 $ 2.47      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross         608,251   3,553,893    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant     2,459,441   2,459,441   2,459,441