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Revenue from Contracts with Customers - Summary of the activity associated with deferred revenue (Detail) - USD ($)
$ in Thousands
3 Months Ended
Aug. 02, 2020
Aug. 04, 2019
Revenue From Contract With Customer [Abstract]    
Beginning balance $ 502 [1] $ 399
Revenue recognized on contract liabilities (593) (483)
Payments received for services not yet rendered 776 768
Ending balance $ 685 $ 684
[1] Derived from audited financial statements.