Warranty Reserves (Tables)

6 Months Ended

Oct. 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 six months ended October 31, 2012 is as follows:

(Amounts in thousands)
Balance at May 1, 2012	$	169
Additional reserves		104
Warranty reserve expense adjustments		(31	)
Charges incurred		(131	)
Balance at October 31, 2012	$	111