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Note 9 - Stock Based Compensation (Tables)
12 Months Ended
Jun. 30, 2021
Notes Tables  
Share-based Payment Arrangement, Option, Activity [Table Text Block]
   
Year Ended June 30,
 
   
2021
   
2020
 
   
 
 
 
 
 
 
Weighted
 
 
 
 
 
 
Weighted
 
   
 
 
Shares
 
 
 
 
Average
 
 
Shares
   
Average
 
   
 
 
Under
 
 
 
 
Exercise
 
 
Under
   
Exercise
 
   
 
 
Options
 
 
 
Price
 
 
 
Options
   
Price
 
Outstanding, beginning of year
   
100,000
    $
14.50
     
    $
 
Granted
   
    $
     
100,000
    $
14.50
 
Exercised
   
    $
     
    $
 
Forfeited
   
    $
     
    $
 
Cancelled
   
    $
     
    $
 
Outstanding, end of year
   
100,000
    $
14.50
     
100,000
    $
14.50
 
Aggregate intrinsic value
  $
595,468
     
 
    $
     
 
 
                                 
Exercisable, end of year
   
50,000
    $
     
    $
 
Aggregate intrinsic value
  $
297,734
     
 
    $
     
 
 
                                 
Available for grant, end of year
   
260,927
     
 
     
466,760
     
 
 
                                 
Weighted average fair value of options granted during the year
(1)
  $
     
 
    $
7.42
     
 
 
Nonvested Restricted Stock Shares Activity [Table Text Block]
   
Number
of
Shares
   
Weighted Average
Fair
Value
Per
Share
 
Nonvested balance at June 30, 2019
   
456,666
    $
18.34
 
Granted
   
233,000
    $
14.81
 
Vested
   
(155,000
)
  $
19.50
 
Forfeited
   
    $
 
Nonvested balance at June 30, 2020
   
534,666
    $
16.47
 
Granted
   
205,833
    $
17.89
 
Vested
   
(339,166
)
  $
17.58
 
Nonvested balance at June 30, 2021
   
401,333
    $
16.28