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Property and Equipment (Tables)
9 Months Ended
Jan. 31, 2015
Property, Plant and Equipment [Abstract]  
Schedule of property and equipment
   
January 31,
   
April 30,
 
($ in thousands)
 
2015
   
2014
 
Land
  $ 726     $ 726  
Building and leasehold improvements
    5,024       5,024  
Furniture and equipment
    5,182       5,312  
      10,932       11,062  
Accumulated depreciation and amortization
    (7,191 )     (7,199 )
Total property and equipment, net
  $ 3,741     $ 3,863