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Note 13 - Earnings Per Common Share (Tables)
 12 Months Ended
Sep. 30, 2017
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
201
7
    
201
6
    
201
5
  
Basic Income (Loss) Per Share
 
 
 
 
  
 
 
 
  
 
 
 
Income (Loss) available to common stockholders
   $
1,408,396
     $
4,632,848
     $
(122,377
 )
Shares denominator
    
2,874,926
      
1,943,625
      
1,638,215
  
Per share amount
   $
0.49
     $
2.38
     $
(0.07
 )
                         
Effect of Dilutive Securities
 
 
 
 
  
 
 
 
  
 
 
 
Average shares outstanding
    
2,874,926
      
1,943,625
      
1,638,215
  
Options
and warrants under convertible note
    
194,151
      
16,496
      
-
  
     
3,069,077
      
1,960,121
      
1,638,215
  
Diluted Income (Loss) Per Share
 
 
 
 
  
 
 
 
  
 
 
 
Income (Loss) available to common stockholders
   $
1,408,396
     $
4,632,848
     $
(122,377
 )
Per share amount
   $
0.46
     $
2.36
     $
(0.07
 )