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Maintenance Contracts (Tables)
 6 Months Ended
Oct. 31, 2013
Maintenance Contracts [Abstract]  
Schedule Of Deferred Maintenance Revenue

 

 

 

 

 

 

 

 

 

 

 

 

Three Months Ended

 

 

Six Months Ended

 

 

October 31,

 

 

October 31,

 

 

2013

 

2012

 

 

2013

 

2012

Beginning balance

$
7,579 

$
7,153 

 

$
8,861 

$
8,302 

Revenue recognized during period

 
(3,494)

 
(4,346)

 

 
(7,039)

 
(8,028)

New maintenance contracts

 
2,518 

 
3,795 

 

 
4,781 

 
6,328 

Ending balance

$
6,603 

$
6,602 

 

$
6,603 

$
6,602