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Note 6 - Property and Equipment (Tables)
12 Months Ended
Apr. 30, 2021
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
As of April 30,
 
($ in thousands)
 
2021
   
2020
 
                 
Building and leasehold improvements
  $
1,013
    $
1,013
 
Operating lease - right-of-use asset
   
7,522
     
8,550
 
Furniture and equipment
   
4,080
     
4,047
 
     
12,615
     
13,610
 
Accumulated depreciation and amortization
   
(4,304
)    
(4,110
)
Total property and equipment, net
  $
8,311
    $
9,500