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Note M - Other Comprehensive Income (Tables)
9 Months Ended
Dec. 31, 2020
Notes Tables  
Comprehensive Income (Loss) [Table Text Block]
   
Three Months Ended December 31, 2020
 
   
Before-Tax
   
Tax
   
Net-of-Tax
 
                         
Cash flow hedges
  $
3,364,460
    $
(706,537
)   $
2,657,923
 
Other comprehensive income
  $
3,364,460
    $
(706,537
)   $
2,657,923
 
   
Nine Months Ended December 31, 2020
 
   
Before-Tax
   
Tax
   
Net-of-Tax
 
                         
Cash flow hedges
  $
3,364,460
    $
(706,537
)   $
2,657,923
 
Other comprehensive income
  $
3,364,460
    $
(706,537
)   $
2,657,923