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Revenue (Customer Accounts Receivable) (Details) - USD ($) | 6 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Sep. 30, 2019
Revenue from Contract with Customer [Abstract] |  |
Unbilled revenue | $ 1,539,460 | $ 1,236,384
Increase (decrease) in Unbilled revenue | 303,076 |
Customer credit balances | 1,361,720 | 880,295
Increase (decrease) in Customer credit balances | 481,425 |
Customer deposits | 1,622,779 | 1,432,031
Increase (decrease) in Customer deposits | 190,748 |
Capitalized Contract Cost [Line Items] |  |
Trade accounts receivable | 5,455,204 | 3,870,211
Trade Accounts Receivable [Member] |  |
Capitalized Contract Cost [Line Items] |  |
Trade accounts receivable | 3,776,033 | $ 2,590,702
Increase (decrease) in Trade accounts receivable | $ 1,185,331 |

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