Warranty

The Company generally offers a one-year limited warranty for its products. The specific terms and conditions of these warranties vary depending upon the product sold. The Company estimates the costs that may be incurred under its basic limited warranty and records a liability for the amount of such costs based at the time revenue is recognized. Factors that affect the Company's warranty liability include the historical and anticipated rates of warranty claims. The Company periodically assesses the adequacy of its recorded warranty liabilities and adjusts the amounts as necessary.

Changes in the Company's warranty liability during the following period were as follows (in thousands):



	Six Months Ended
	October 30, 2011
Beginning balance at April 30, 2011	$	4,469
Additions during the period based on product sold	1,452
Additions during the period due to acquisition of controlling interest in subsidiary	313
Change in estimates	(557		)
Settlements and expirations	(2,238		)
Ending balance at October 30, 2011	$	3,439