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Income Taxes (Narrative) (Details) (USD $)
 12 Months Ended
Dec. 28, 2012
Dec. 30, 2011
Dec. 27, 2013
Income Tax Examination [Line Items]      
Income tax benefit included the valuation allowance $ 6,700,000 $ 5,300,000  
Foreign net operating loss carryforwards     20,200,000
Valuation allowance 1,624,000   1,569,000
Accrued income tax-related interest and penalties 212,000   226,000
ASC 740-10 tax liabilities, current 1,015,000 170,000 716,000
U.S. Federal [Member]
      
Income Tax Examination [Line Items]      
U.S. operating loss carryforwards     16,500,000
State [Member]
      
Income Tax Examination [Line Items]      
U.S. operating loss carryforwards     3,100,000
UNITED KINGDOM
      
Income Tax Examination [Line Items]      
Foreign net operating loss carryforwards     15,200,000
FRANCE
      
Income Tax Examination [Line Items]      
Foreign net operating loss carryforwards     1,400,000
GERMANY
      
Income Tax Examination [Line Items]      
Foreign net operating loss carryforwards     $ 700,000