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Revenue (Customer Accounts Receivable) (Details) - USD ($)
9 Months Ended
Jun. 30, 2020
Sep. 30, 2019
Revenue from Contract with Customer [Abstract]    
Unbilled revenue $ 897,589 $ 1,236,384
Increase (decrease) in Unbilled revenue (338,795)  
Customer credit balances 1,133,566 880,295
Increase (decrease) in Customer credit balances 253,271  
Customer deposits 1,652,387 1,432,031
Increase (decrease) in Customer deposits 220,356  
Capitalized Contract Cost [Line Items]    
Trade accounts receivable 3,296,251 3,870,211
Trade Accounts Receivable [Member]    
Capitalized Contract Cost [Line Items]    
Trade accounts receivable 2,257,426 $ 2,590,702
Increase (decrease) in Trade accounts receivable $ (333,276)