Product Warranty (Tables)

6 Months Ended

Oct. 31, 2015

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: 

	Six Months Ended
	October 31,
(in thousands)	2015			2014
Beginning balance at May 1	$	2,643		$	1,910
Accrual	8,269			7,777
Settlements	(7,896		)	(7,084		)
Ending balance at October 31	$	3,016		$	2,603