Warranty Reserves (Tables)

3 Months Ended

Jul. 31, 2012

Warranty Reserves [Abstract]

Product warranty reserve activity

Estimated warranty costs are accrued as revenues are recognized.  Included in the warranty cost accruals are costs for basic warranties on products sold.  A summary of product warranty reserve activity for the three months ended July 31, 2012 is as follows:

(Amounts in thousands)
Balance at May 1, 2012	$	169
Additional reserves		86
Warranty reserve expense adjustments		(21	)
Charges incurred		(60	)
Balance at July 31, 2012	$	174