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Intangible Assets (Schedule Of Estimated Future Amortization Expense) (Details) - USD ($)
$ in Thousands
Jul. 31, 2015
Apr. 30, 2015
Intangible Assets [Abstract]    
Remainder of 2016 $ 761  
2017 814  
2018 774  
2019 774  
2020 558  
Thereafter 86  
Finite-lived intangible assets, Net carrying amount $ 3,767 $ 4,102