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Fair Value of Financial Instruments - Carrying Value and Fair Value Estimate of Current and Long Term Debt (Detail) - USD ($)
$ in Thousands
Dec. 28, 2017
Jun. 29, 2017
Dec. 29, 2016
Fair Value Disclosures [Abstract]      
Carrying value of long-term debt: $ 38,256 $ 28,808 $ 30,532
Fair value of long-term debt: $ 38,584 $ 29,316 $ 31,124