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Product Warranty
 9 Months Ended
Jan. 31, 2017
Product Warranties Disclosures [Abstract]  
Product Warranty
Product Warranty
 
The Company estimates outstanding warranty costs based on the historical relationship between warranty claims and revenues.  The warranty accrual is reviewed monthly to verify that it properly reflects the remaining obligation based on the anticipated expenditures over the balance of the obligation period.  Adjustments are made when actual warranty claim experience differs from estimates.  Warranty claims are generally made within two months of the original shipment date.
 
The following is a reconciliation of the Company’s warranty liability, which is included in other accrued expenses on the balance sheet: 
 

Nine Months Ended
 

January 31,
(in thousands)

2018

2017
Beginning balance at May 1

$
3,262


$
2,926

Acquisition

119


—

Accrual

14,943


13,460

Settlements

(14,760
)

(13,376
)







Ending balance at January 31

$
3,564


$
3,010