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Note 8 - Goodwill and Intangible Assets (Tables) | 3 Months Ended
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Dec. 31, 2018
Notes Tables |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
|  | December 31, |  |  | September 30, |
|  | 2018 |  |  | 2018 |
Technology |  | $ | 639,381 |  |  | $ | 648,208 |
Customer relationships |  |  | 611,582 |  |  |  | 620,026 |
Trade name portfolio |  |  | 222,394 |  |  |  | 225,464 |
Non-compete agreements |  |  | 240,926 |  |  |  | 244,252 |
Patents |  |  | 72,126 |  |  |  | 72,126 |
|  |  | 1,786,409 |  |  |  | 1,810,076 |
Accumulated amortization |  |  | (326,837 | ) |  |  | (252,730 | )
|  | $ | 1,459,572 |  |  | $ | 1,557,346 |
|  | December 31, |  |  | December 31, |
|  | 2018 |  |  | 2017 |
Amortization expense |  | $ | 76,807 |  |  | $ | 1,804 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
2019 |  | $ | 307,884 |
2020 |  |  | 307,633 |
2021 |  |  | 230,373 |
2022 |  |  | 226,957 |
2023 |  |  | 183,869 |
Thereafter |  |  | 202,856 |
Total estimated amortization expense |  | $ | 1,459,572 |

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