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Note 16 - Net Loss Per Share - Basic and Diluted Loss Per Share (Details) - USD ($)
12 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Net loss available to common stockholders $ (3,745,042) $ (876,754)
Basic and diluted (in shares) 32,492,645 31,855,430
Basic loss per common share (in dollars per share) $ (0.12) $ (0.03)
Diluted loss per common share (in dollars per share) $ (0.12) $ (0.03)
Antidilutive securities (in shares) 3,613,188 4,788,502
Employee Stock Option [Member]    
Antidilutive securities (in shares) 3,394,858 4,663,502
Restricted Stock Units (RSUs) [Member]    
Antidilutive securities (in shares) 218,330 125,000