Product Warranty (Tables)

3 Months Ended

Jul. 31, 2016

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: 

	Three Months Ended
	July 31,
(in thousands)	2016			2015
Beginning balance at May 1	$	2,926		$	2,643
Accrual	4,420			3,756
Settlements	(4,334		)	(3,522		)
Ending balance at July 31	$	3,012		$	2,877