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Note K - Economic Dependency (Tables)
 12 Months Ended
Jun. 30, 2020
Supplier Concentration Risk [Member]  
Notes Tables  
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]
   
Year ended June 30,
 
   
2020
    
2019
  
   
Raw Material
Purchases by
Supplier
   
% of Total
Raw
Material
Purchases
   
Raw Material
Purchases by
Supplier
   
% of Total
Raw
Material
Purchases
  
Supplier 1
   $
6,356
      
10
%
  
 
(a)
    
 
(a)
 %
Supplier 2
  
 
(a)
    
 
(a)
      
8,240
      
11
  
    $
6,356
      
10
%
   $
8,240
      
11
%
Customer Concentration Risk [Member]  
Notes Tables  
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]
   
Fiscal 2020
    
Fiscal 201
9
  
Customer 1
   $
52,462
     $
68,197
  
Customer 2
    
24,692
      
26,102
  
    $
77,154
     $
94,299