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Warranty Reserves (Details) - USD ($)
$ in Thousands
3 Months Ended
Jul. 31, 2021
Aug. 01, 2020
Warranty Reserves    
Beginning balance $ 2,341 $ 2,015
Balance acquired from acquisition 256  
Warranty expense 456 451
Warranty costs settled (299) (435)
Ending balance $ 2,754 $ 2,031