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Note G - Economic Dependency (Tables)
 3 Months Ended
Sep. 30, 2020
Supplier Concentration Risk [Member]  
Notes Tables  
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]
   
Three Months Ended
September 30,
  
   
2020
    
2019
  
                 
Supplier 1
   $
3,375
      
(a)
  
    $
3,375
      
(a)
  
Customer Concentration Risk [Member]  
Notes Tables  
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]
   
Three Months Ended
September 30,
  
   
20
20
    
2019
  
                 
Customer 1
   $
23,958
     $
14,354
  
Customer 2
  
(a
)
    
3,970
  
Customer 3
  
(a
)
    
3,225
  
    $
23,958
     $
21,549