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Fair Values of Financial Instruments (Details) - USD ($)
$ in Thousands
Oct. 03, 2015
Dec. 27, 2014
Oct. 04, 2014
Dec. 28, 2013
Financial assets, Carrying Amount        
Cash and cash equivalents, Carrying Amount $ 2,701 $ 3,232 $ 798 $ 2,346
Time deposits, Carrying Amount 0 1,450 2,450  
Financial liabilities, Carrying Amount        
Notes payable, Carrying Amount 27,963 16,200 15,631  
Current portion of Long-term debt, Carrying Amount 1,810 1,586 1,586  
Long-term debt, Carrying Amount 1,750 3,360 3,360  
Fair Value, Inputs, Level 1 [Member]        
Financial assets, Fair Value        
Cash and cash equivalents, Fair Value 2,701 3,232 798  
Time deposits, Fair Value 0 1,450 2,450  
Financial liabilities, Fair Value        
Notes payable, Fair Value 0 0 0  
Current portion of Long-term debt, Fair Value 0 0 0  
Long-term debt, Fair Value 0 0 0  
Fair Value, Inputs, Level 2 [Member]        
Financial assets, Fair Value        
Cash and cash equivalents, Fair Value 0 0 0  
Time deposits, Fair Value 0 0 0  
Financial liabilities, Fair Value        
Notes payable, Fair Value 27,963 16,200 15,631  
Current portion of Long-term debt, Fair Value 1,810 1,586 1,586  
Long-term debt, Fair Value 1,750 3,360 3,360  
Fair Value, Inputs, Level 3 [Member]        
Financial assets, Fair Value        
Cash and cash equivalents, Fair Value 0 0 0  
Time deposits, Fair Value 0 0 0  
Financial liabilities, Fair Value        
Notes payable, Fair Value 0 0 0  
Current portion of Long-term debt, Fair Value 0 0 0  
Long-term debt, Fair Value $ 0 $ 0 $ 0