Product Warranty (Tables)

9 Months Ended

Jan. 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: 

	Nine Months Ended
	January 31,
(in thousands)	2016			2015
Beginning balance at May 1	$	2,643		$	1,910
Accrual	11,668			10,818
Settlements	(11,755		)	(10,380		)
Ending balance at January 31	$	2,556		$	2,348