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Note 5 - Loss Per Share (Tables)
12 Months Ended
Jun. 30, 2021
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
 Fiscal Year Ended 
   
June 30, 2021
   
 
June 30, 2020
 
Net income/(loss) attributable to common stock
  $
23,869,123
    $
(9,240,041
)
       Weighted average shares for basic EPS    
6,250,894
     
6,475,795
 
       Effect of dilutive securities    
2,767
     
 
       Weighted average shares for diluted EPS    
6,253,661
     
6,475,795
 
       Basic EPS   $
3.82
    $
(1.43
)
       Diluted EPS   $
3.82
    $
(1.43
)