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Note 12 - Stock Based Compensation (Tables)
12 Months Ended
Jun. 30, 2022
Notes Tables  
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
  

Year Ended June 30,

 
  2022  

2021

 
        Weighted      

Weighted

 
    Shares    Average  

Shares

  

Average

 
    Under    Exercise  

Under

  

Exercise

 
    Options   Price   

Options

  

Price

 

Outstanding, beginning of year

  100,000  $14.50   100,000  $14.50 

Granted

            

Exercised

            

Forfeited

            

Cancelled

            

Outstanding, end of year

  100,000  $14.50   100,000  $14.50 

Aggregate intrinsic value

 $811,000      $595,468     
                 

Exercisable, end of year

  100,000  $   50,000  $ 

Aggregate intrinsic value

 $811,000      $297,734     
                 

Available for grant, end of year

  100,427       260,927     
                 

Weighted average fair value of options granted during the year (1)

 $      $     
Nonvested Restricted Stock Shares Activity [Table Text Block]
  

Number of

Shares

  

Weighted Average

Fair Value

Per Share

 

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 

Granted

  160,500  $21.73 

Vested

  (245,499

)

 $15.39 

Nonvested balance at June 30, 2022

  316,334  $19.73