Product Warranty (Tables)

9 Months Ended

Jan. 31, 2017

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)	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