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Income Taxes (Details Textual) (USD $)
 12 Months Ended
Dec. 29, 2012
Dec. 31, 2011
Jan. 01, 2011
Jan. 02, 2010
Income Taxes (Additional Textual) [Abstract]        
Payment of interest related to unrecognized tax benefits $ 67,000      
Tax loss mainly from the disposal of discontinued operations and anticipates the ability to claim a tax refund 600,000      
Company recognized tax benefit 300,000      
Tax credit carryforward expiration year 2026      
Ending balance of unrecognized tax benefits 954,000 1,191,000 865,000 637,000
Unrecognized tax benefits recognition impact on income tax rate 0      
Change in unrecognized tax benefits 954,000      
Federal [Member]
        
Income Taxes (Textual) [Abstract]        
Net operating loss 13,900,000      
Research Credits 1,000,000      
Net operating loss expiration year 2022      
State [Member]
        
Income Taxes (Textual) [Abstract]        
Net operating loss 11,700,000      
Stock option deduction 1,300,000      
Research Credits $ 1,500,000      
Net operating loss expiration year 2020