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Organization, Business and Summary of Significant Accounting Policies: (Details 5) (USD $)
12 Months Ended
Dec. 29, 2012
Dec. 31, 2011
Self-Insurance Reserves    
Annual claims threshold per covered participant for stop loss coverage $ 75,000  
Aggregate claims threshold for stop loss coverage 1,500,000  
Estimated unpaid claims included in accrued liabilities 400,000 300,000
Marketing Costs    
Advertising costs included in selling, general and administration expenses 900,000 1,000,000
Costs and fees relating to execution of in-store product demonstrations $ 1,900,000 $ 3,600,000
Stock options | Minimum
   
Stock Options and Stock-Based Compensation    
Requisite period of the award over which stock based compensation award expenses are recognized 1 year  
Stock options | Maximum
   
Stock Options and Stock-Based Compensation    
Requisite period of the award over which stock based compensation award expenses are recognized 5 years  
Restricted stock | Minimum
   
Stock Options and Stock-Based Compensation    
Requisite period of the award over which stock based compensation award expenses are recognized 1 year  
Restricted stock | Maximum
   
Stock Options and Stock-Based Compensation    
Requisite period of the award over which stock based compensation award expenses are recognized 3 years