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Financial Instruments Not Recorded at Fair Value (Detail) - USD ($)
$ in Thousands
Jun. 25, 2016
Dec. 26, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Note payable $ 400 $ 458
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Note payable $ 400 $ 458