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Revenue from Contracts with Customers - Summary of the activity associated with deferred revenue (Detail) - USD ($)
$ in Thousands
6 Months Ended
Nov. 01, 2020
Nov. 03, 2019
Revenue From Contract With Customer [Abstract]    
Beginning balance $ 502 [1] $ 399
Revenue recognized on contract liabilities (1,197) (1,536)
Payments received for services not yet rendered 1,070 1,512
Ending balance $ 375 $ 375
[1] Derived from audited financial statements.