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Investment in Unconsolidated Joint Venture - Summary of Equity Method Investment (Detail) - CLIH [Member] - USD ($)
$ in Thousands
Apr. 28, 2019
Apr. 29, 2018
Schedule of Equity Method Investments [Line Items]    
Total assets $ 3,126 $ 3,130
Total liabilities 111 128
Total members' equity $ 3,015 $ 3,002