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)	2017			2016
Beginning balance at May 1	$	2,926		$	2,643
Accrual	13,460			11,668
Settlements	(13,376		)	(11,755		)
Ending balance at January 31	$	3,010		$	2,556