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Intangible Assets (Schedule Of Finite-Lived Intangible Assets, Future Amortization Expense) (Details) (USD $)
In Thousands, unless otherwise specified
Jul. 31, 2014
Apr. 30, 2014
Intangible Assets [Abstract]    
Remainder of 2015 $ 1,130  
2016 1,096  
2017 814  
2018 774  
2019 774  
Thereafter 642  
Finite-lived intangible assets, Net carrying amount $ 5,230 $ 5,614