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Equipment, Furniture and Fixtures (Tables)
 3 Months Ended
Jul. 31, 2014
Equipment, Furniture and Fixtures [Abstract]  
Net equipment, furniture and fixtures
Net equipment, furniture and fixtures consisted of the following:
   
July 31,
   
April 30,
 
   
2014
   
2014
 
(Amounts in thousands)
         
Plant and machinery
 
$
690
   
$
662
 
Computer equipment
   
1,803
     
1,741
 
Leasehold improvement
   
201
     
201
 
Furniture, fixtures and equipment
   
96
     
96
 
Construction in progress
   
20
     
85
 
     
2,810
     
2,785
 
Accumulated depreciation and amortization
   
(2,221
)
   
(2,173
)
Net equipment, furniture and fixtures 
 
$
589
   
$
612