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Note 12 - Income (Loss) Per Share - Basic and Diluted Earnings Per Share (Details) - USD ($)
 3 Months Ended 6 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2017
Mar. 31, 2016
Numerator:        
Income (loss) available to common stockholders $ 298,350 $ (664,663) $ (514,329) $ (1,044,736)
Denominator:        
Basic (in shares) 31,800,103 31,828,167 31,800,103 32,146,928
Assumed exercise of dilutive options and warrants (in shares) 63,799
Weighted average dilutive shares outstanding (in shares) 31,863,902 31,828,167 31,800,103 32,146,928
Basic income (loss) per common share (in dollars per share) $ 0.01 $ (0.02) $ (0.02) $ (0.03)
Diluted income (loss) per common share (in dollars per share) $ 0.01 $ (0.02) $ (0.02) $ (0.03)
Potentially dilutive securities outstanding at period end excluded from the diluted computation as the inclusion would have been antidilutive:        
Potentially dilutive securities (in shares) 3,311,836 2,989,836 3,239,836 2,989,836
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) 3,061,836 2,989,836 2,989,836 2,989,836
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) 250,000 250,000