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Note 12 - Net Loss Per Share (Tables)
 3 Months Ended
Dec. 31, 2017
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three months ended
  
   
December 31,
  
   
2017
    
2016
  
Numerator:
  
 
 
 
  
 
 
 
Loss available to common stockholders
   $
(1,683,253
 )   $
(812,680
 )
                 
Denominator:
  
 
 
 
  
 
 
 
Weighted average common shares outstanding
    
32,236,039
      
31,800,103
  
                 
Basic loss per common share
   $
(0.05
 )   $
(0.03
 )
Diluted loss per common share
   $
(0.05
 )   $
(0.03
 )
                 
Potentially dilutive securities outstanding at period end excluded from the diluted computation as the inclusion would have been antidilutive:                
Options
    
3,289,067
      
4,849,002