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Note 11 - Comprehensive Income (Tables)
12 Months Ended
Apr. 30, 2021
Notes Tables  
Comprehensive Income (Loss) [Table Text Block]
   
Fiscal Year Ended April 30, 2021
 
($ in thousands)
 
Amount Before Tax
   
Tax (Expense) / Benefit
   
Amount Net of Tax
 
Change in unrealized gains on available-for-sale fixed income securities
  $
(173
)   $
45
    $
(128
)
    $
(173
)   $
45
    $
(128
)
   
Fiscal Year Ended April 30, 2020
 
($ in thousands)
 
Amount Before Tax
   
Tax (Expense) / Benefit
   
Amount Net of Tax
 
Change in unrealized gains on available-for-sale fixed income securities
  $
134
    $
(37
)   $
97
 
    $
134
    $
(37
)   $
97
 
   
Fiscal Year Ended April 30, 2019
 
($ in thousands)
 
Amount Before Tax
   
Tax (Expense) / Benefit
   
Amount Net of Tax
 
Change in unrealized gains on available-for-sale fixed income securities
  $
46
    $
(10
)   $
36
 
    $
46
    $
(10
)   $
36