Product Warranty (Tables)

9 Months Ended

Jan. 31, 2018

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 balance sheet: 

	Nine Months Ended
	January 31,
(in thousands)	2019			2018
Beginning balance at May 1	$	4,045		$	3,262
Acquisition	—			119
Accrual	18,406			14,943
Settlements	(18,315		)	(14,760		)
Ending balance at January 31	$	4,136		$	3,564