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Note 8 - Goodwill and Intangible Assets (Tables) | 6 Months Ended
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Mar. 31, 2019
Notes Tables |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
|  | March 31, |  |  | September 30, |
|  | 2019 |  |  | 2018 |
Technology |  | $ | 626,648 |  |  | $ | 648,208 |
Customer relationships |  |  | 599,403 |  |  |  | 620,026 |
Trade name portfolio |  |  | 217,965 |  |  |  | 225,464 |
Non-compete agreements |  |  | 236,128 |  |  |  | 244,252 |
Patents |  |  | 72,126 |  |  |  | 72,126 |
|  |  | 1,752,270 |  |  |  | 1,810,076 |
Accumulated amortization |  |  | (396,561 | ) |  |  | (252,730 | )
|  | $ | 1,355,709 |  |  | $ | 1,557,346 |
|  | Three months ended |  |  | Six months ended |
|  | March 31, |  |  | March 31, |
|  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
Amortization expense |  | $ | 76,633 |  |  | $ | 70,038 |  |  | $ | 153,440 |  |  | $ | 71,842 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
Estimated Amortization Expense for the twelve months ended March 31, |  |  |  |
2020 |  | $ | 301,741 |
2021 |  |  | 285,128 |
2022 |  |  | 222,575 |
2023 |  |  | 213,376 |
2024 |  |  | 178,288 |
Thereafter |  |  | 154,601 |
Total estimated amortization expense |  | $ | 1,355,709 |

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