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Note 8 - Goodwill and Intangible Assets (Tables) | 9 Months Ended
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Jun. 30, 2019
Notes Tables |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
|  | June 30, |  |  | September 30, |
|  | 2019 |  |  | 2018 |
Technology |  | $ | 635,045 |  |  | $ | 648,208 |
Customer relationships |  |  | 607,435 |  |  |  | 620,026 |
Trade name portfolio |  |  | 220,886 |  |  |  | 225,464 |
Non-compete agreements |  |  | 239,292 |  |  |  | 244,252 |
Patents |  |  | 72,126 |  |  |  | 72,126 |
|  |  | 1,774,784 |  |  |  | 1,810,076 |
Accumulated amortization |  |  | (477,819 | ) |  |  | (252,730 | )
|  | $ | 1,296,965 |  |  | $ | 1,557,346 |
|  | Three months ended |  |  | Nine months ended |
|  | June 30, |  |  | June 30, |
|  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
Amortization expense |  | $ | 75,354 |  |  | $ | 81,262 |  |  | $ | 228,793 |  |  | $ | 153,026 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
2020 |  | $ | 305,695 |
2021 |  |  | 268,860 |
2022 |  |  | 225,455 |
2023 |  |  | 205,087 |
2024 |  |  | 180,507 |
Thereafter |  |  | 111,361 |
Total estimated amortization expense |  | $ | 1,296,965 |

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