Quarterly report pursuant to Section 13 or 15(d)

Accounts Receivable and Concentration of Credit Risk (Components Of Accounts Receivable) (Details)

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Accounts Receivable and Concentration of Credit Risk (Components Of Accounts Receivable) (Details) - USD ($)
Jun. 30, 2019
Sep. 30, 2018
Jun. 30, 2018
Sep. 30, 2017
Accounts Receivable and Concentration of Credit Risk [Abstract]        
Accounts receivable $ 4,838,665 $ 4,046,733    
Less: allowance for doubtful accounts (33,143) (36,201) $ (36,161) $ (38,103)
Less: allowance for sales and payment term discounts (38,560) (37,900)    
Accounts receivable, net $ 4,766,962 $ 3,972,632