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Note 4 - Earnings Per Share (Tables)
 3 Months Ended
Dec. 31, 2018
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three months ended
December 31,
  
   
201
8
    
201
7
  
Net income
   $
2,197
      
5,181
  
                 
Weighted average number of shares of common stock outstanding
    
22,386,566
      
22,359,828
  
Effect of dilutive securities
    
209,395
      
6,921
  
Weighted average number of shares of common stock outstanding including effect of dilutive securities
    
22,595,961
      
22,366,749
  
                 
Basic earnings per share
   $
0.10
      
0.23
  
Diluted earnings per share
   $
0.10
      
0.23