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Note 9 - Property and Equipment (Tables)
3 Months Ended
Jul. 31, 2020
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
July 31,
   
April 30,
 
($ in thousands)
 
2020
   
2020
 
                 
Building and leasehold improvements
  $
1,013
    $
1,013
 
Operating lease - right-of-use asset
   
8,298
     
8,550
 
Furniture and equipment
   
4,054
     
4,047
 
     
13,365
     
13,610
 
Accumulated depreciation and amortization
   
(4,159
)    
(4,110
)
Total property and equipment, net
  $
9,206
    $
9,500