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Product Warranty (Tables)
3 Months Ended
Jul. 31, 2021
Product Warranties Disclosures [Abstract]  
Schedule of Warranty Liability
The following is a reconciliation of the Company's warranty liability, which is included in other accrued expenses on the unaudited condensed consolidated balance sheets: 
 Three Months Ended
 July 31,
(in thousands)20222021
Beginning balance at May 1$6,878 $5,249 
Accrual9,095 4,814 
Settlements(8,109)(4,559)
Ending balance at July 31$7,864 $5,504