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Note 12 - (Loss) Income Per Share - Basic and Diluted Earnings Per Share (Details) - USD ($)
 3 Months Ended 9 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Numerator:        
(Loss) income available to common stockholders $ (528,163) $ 276,922 $ (1,042,492) $ (767,814)
Denominator:        
Basic (in shares) 31,861,916 31,798,853 31,820,632 32,028,153
Assumed exercise of dilutive options and warrants (in shares) 62,455
Weighted average dilutive shares outstanding (in shares) 31,861,916 31,861,308 31,820,632 32,028,153
Basic income (loss) per common share (in dollars per share) $ (0.02) $ 0.01 $ (0.03) $ (0.02)
Diluted income (loss) per common share (in dollars per share) $ (0.02) $ 0.01 $ (0.03) $ (0.02)
Potentially dilutive securities outstanding at period end excluded from the diluted computation as the inclusion would have been antidilutive:        
Potentially dilutive securities (in shares) 4,978,002 2,348,083 4,978,002 2,895,669
Employee Stock Option [Member]        
Potentially dilutive securities outstanding at period end excluded from the diluted computation as the inclusion would have been antidilutive:        
Potentially dilutive securities (in shares) 4,853,002 2,348,083 4,853,002 3,351,169
Restricted Stock Units (RSUs) [Member]        
Potentially dilutive securities outstanding at period end excluded from the diluted computation as the inclusion would have been antidilutive:        
Potentially dilutive securities (in shares) 125,000 125,000