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Fair Value Measurements; Fair Value of Financial Instruments (Details 1) - Fair Value Inputs Level 3 [Member] - USD ($)
$ in Thousands
Jun. 24, 2016
Dec. 25, 2015
Carrying Value [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Convertible Secured Notes $ 36,750 $ 36,750
Fair Value [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Convertible Secured Notes $ 33,024 $ 34,300