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Note 8 - Goodwill and Intangible Assets (Tables) | 6 Months Ended
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Mar. 31, 2020
Notes Tables |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
|  | March 31, |  |  | September 30, |
|  | 2020 |  |  | 2019 |
Technology |  | $ | 614,519 |  |  | $ | 611,043 |
Customer relationships |  |  | 587,801 |  |  |  | 584,477 |
Trade name portfolio |  |  | 213,746 |  |  |  | 212,537 |
Non-compete agreements |  |  | 231,558 |  |  |  | 230,248 |
Patents |  |  | 72,126 |  |  |  | 72,126 |
|  |  | 1,719,750 |  |  |  | 1,710,431 |
Accumulated amortization |  |  | (685,589 | ) |  |  | (534,797 | )
|  | $ | 1,034,161 |  |  | $ | 1,175,634 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
Fiscal year ending September 30, |  |  |  |
2020 (remaining six months) |  | $ | 148,666 |
2021 |  |  | 240,926 |
2022 |  |  | 218,285 |
2023 |  |  | 187,542 |
2024 |  |  | 174,661 |
Thereafter |  |  | 64,081 |
Total estimated amortization expense |  | $ | 1,034,161 |

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