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Note K - Stock-based Compensation (Tables)
12 Months Ended
Jun. 30, 2018
Notes Tables  
Schedule Of Share-based Compensation Shares Available For Future Options [Table Text Block]
   
2018
   
2017
 
2010 Employee Incentive Plan
   
-
     
97,609
 
2010 Directors' Plan
   
80,938
     
100,426
 
Share-based Compensation, Stock Options, Activity [Table Text Block]
   
 
 
 
 
 
 
 
 
Weighted Average
   
 
 
 
   
 
 
 
 
Weighted
   
Remaining
   
Aggregate
 
   
 
 
 
 
Average
   
Contractual
   
Intrinsic
 
   
2018
   
Price
   
Life (years)
   
Value
 
                                 
Non-qualified stock options:
                               
Options outstanding at beginning of year
   
13,200
    $
16.47
     
 
     
 
 
Granted
   
-
     
-
     
 
     
 
 
Canceled/expired
   
(3,600
)    
27.55
     
 
     
 
 
Exercised
   
(2,400
)    
12.31
     
 
     
 
 
Options outstanding at June 30
   
7,200
    $
12.31
     
1.50
    $
90.2