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Note 14 - Capital Structure and Stock-based Compensation (Tables)
 12 Months Ended
Jun. 30, 2017
Notes Tables  
Schedule of Stock Options Roll Forward [Table Text Block]
    June 30,
    2017   2016   2015
        Weighted       Weighted       Weighted
        Average       Average       Average
    Shares   Exercise Price   Shares   Exercise Price   Shares   Exercise Price
Options outstanding at beginning of period    
10,000
     $
16.00
      
10,000
     $
16.00
      
10,000
     $
16.00
  
Exercised    
4,000
      
16.00
      
-
      
-
      
-
      
-
  
Granted    
-
      
-
      
-
      
-
      
-
      
-
  
Options outstanding at end of period    
6,000
     $
16.00
      
10,000
     $
16.00
      
10,000
     $
16.00
  
Options exercisable at end of period    
4,000
      
 
      
6,000
      
 
      
4,000
      
 
  
Shares available for issuance    
2,322,643
      
 
      
2,219,845
      
 
      
2,115,246
      
 
  
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]
As of June 30, 2017
Options Outstanding   Options Exercisable
        Weighted Average            
Range of   Number   Remaining Contractual   Weighted Average   Number   Weighted Average
Exercise prices   Outstanding   Life (in years)   Exercise Price   Exercisable   Exercise Price
                                         
$16.00
-
$16.00
    
6,000
      
5.08
     $
16.00
      
4,000
     $
16.00