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Investment in Unconsolidated Joint Venture - Summary of Equity Method Investment (Detail) - CLIH [Member] - USD ($) $ in Thousands | Apr. 30, 2017 | May 01, 2016
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Schedule of Equity Method Investments [Line Items] |  |
total assets | $ 2,258 | $ 0
total liabilities | 46 | 0
total members' equity | $ 2,212 | $ 0

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