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Debt - Schedule of Required Principal Payments Remaining on Long Term Debt Outstanding (Detail) - Term Loan [Member]
$ in Thousands
Jul. 29, 2017
USD ($)
Debt Instrument [Line Items]  
Fiscal 2018 $ 828
Fiscal 2019 1,472
Fiscal 2020 1,840
Fiscal 2021 2,208
Fiscal 2022 2,576
Long term debt $ 8,924