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Note 6 - Earnings Per Share (EPS) (Tables)
 6 Months Ended
Dec. 31, 2018
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three months Ended December 31,
    
Six months Ended December 31,
  
   
2018
    
2017
    
2018
    
2017
  
   
(In thousands, except share and per share data)
  
                                 
Net income
   $
5,125
     $
3,304
     $
9,659
     $
7,890
  
                                 
Weighted average shares used in calculation of basic EPS
    
9,048,397
      
8,924,495
      
9,022,161
      
8,883,003
  
Incremental shares from assumed exercise of dilutive securities
    
153,160
      
243,589
      
170,482
      
246,007
  
Weighted average shares used in calculation of diluted EPS
    
9,201,557
      
9,168,084
      
9,192,643
      
9,129,010
  
                                 
Basic earnings per common share
   $
0.57
     $
0.37
     $
1.07
     $
0.89
  
Diluted earnings per common share
   $
0.56
     $
0.36
     $
1.05
     $
0.86