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Significant Accounting Policies - Narrative (Detail) - USD ($)
$ in Thousands
Aug. 04, 2019
Apr. 29, 2019
Right-of-use assets $ 6,530 $ 7,191 [1]
Operating Lease Liability $ 6,411  
Accounting Standards Update 2016-02 [Member]    
Right-of-use assets   7,200
Operating Lease Liability   $ 7,100
[1] Represents adoption date of Topic 842.