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Investment in Unconsolidated Joint Venture - Summary of Equity Method Investment (Detail) - CLIH [Member] - USD ($) $ in Thousands | Oct. 28, 2018 | Apr. 29, 2018 | Oct. 29, 2017
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Schedule of Equity Method Investments [Line Items] |  |  |
Total assets | $ 3,063 | $ 3,130 | $ 3,180
Total liabilities | 124 | 128 | 136
Total members' equity | $ 2,939 | $ 3,002 | $ 3,044

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