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Fair Values of Financial Instruments (Details) - USD ($)
$ in Thousands
Dec. 30, 2017
Dec. 31, 2016
Dec. 26, 2015
Dec. 27, 2014
Financial assets, Carrying Amount        
Cash and cash equivalents, Carrying Amount $ 1,572 $ 1,013 $ 1,982 $ 3,232
Financial liabilities, Carrying Amount        
Current portion of Long-term debt, Carrying Amount 1,250 1,250    
Long-term debt, Carrying Amount 21,871 24,189    
Fair Value, Inputs, Level 1 [Member]        
Financial assets, Fair Value        
Cash and cash equivalents, Fair Value 1,572 1,013    
Financial liabilities, Fair Value        
Current portion of Long-term debt, Fair Value 0 0    
Long-term debt, Fair Value 0 0    
Fair Value, Inputs, Level 2 [Member]        
Financial assets, Fair Value        
Cash and cash equivalents, Fair Value 0 0    
Financial liabilities, Fair Value        
Current portion of Long-term debt, Fair Value 1,250 1,250    
Long-term debt, Fair Value 21,871 24,189    
Fair Value, Inputs, Level 3 [Member]        
Financial assets, Fair Value        
Cash and cash equivalents, Fair Value 0 0    
Financial liabilities, Fair Value        
Current portion of Long-term debt, Fair Value 0 0    
Long-term debt, Fair Value $ 0 $ 0