Maintenance Contracts (Tables)

12 Months Ended

Apr. 30, 2013

Maintenance Contracts [Abstract]

Schedule Of Deferred Maintenance Revenue

		Year Ended		Year Ended
		April 30,		April 30,
		2013		2012
Deferred maintenance revenue beginning balance	$	8,302	$	8,420
Deferred maintenance revenue recognized during period		(15,622)		(16,090)
Deferred maintenance revenue of new maintenance contracts		16,181		15,972
Deferred maintenance revenue ending balance	$	8,861	$	8,302