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Note 16 - Net Income (Loss) 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,
 
   
2018
   
2017
 
Numerator
               
Net income (loss)
  $
1,045,940
    $
(1,683,253
)
                 
Denominator
               
Weighted average common shares outstanding
   
32,896,021
     
32,236,039
 
Assumed exercise of dilutive options and restricted stock units
   
674,845
     
-
 
Weighted average dilutive shares outstanding
   
33,570,866
     
32,236,039
 
                 
Basic income (loss) per common share
  $
0.03
    $
(0.05
)
Diluted income (loss) per common share
  $
0.03
    $
(0.05
)
                 
Potentially dilutive securities outstanding at period end excluded from diluted computation as the inclusion would have been antidilutive:
               
Options
   
991,750
     
3,289,067
 
Restricted stock units
   
-
     
125,000
 
Total
   
991,750
     
3,414,067