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Property and Equipment (Tables)
 12 Months Ended
Apr. 30, 2013
Property, Plant and Equipment [Abstract]  
Schedule of property and equipment
 
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As of April 30,
  
($ in thousands)
  
2013
    
2012
  
             
Land
   $ 726     $ 726  
Building and leasehold improvements
     7,391       7,283  
Furniture and equipment
     11,180       10,955  
      19,297       18,964  
Accumulated depreciation and amortization
     (15,367 )     (15,110 )
Total property and equipment, net
   $ 3,930     $ 3,854