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Note 5 - Goodwill and Intangible Assets (Tables) | 6 Months Ended
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Mar. 31, 2018
Notes Tables |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
|  | March 31, 2018 |  |  | September 31, 2017 |
|  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net Carrying Amount |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net Carrying Amount |
Technology |  | $ | 690,000 |  |  | $ | (20,536 | ) |  | $ | 669,464 |  |  | $ | - |  |  | $ | - |  |  | $ | - |
Customer relationships |  |  | 660,000 |  |  |  | (19,642 | ) |  |  | 640,358 |  |  |  | - |  |  |  | - |  |  |  | - |
Trade name portfolio |  |  | 240,000 |  |  |  | (10,000 | ) |  |  | 230,000 |  |  |  | - |  |  |  | - |  |  |  | - |
Non-compete agreements |  |  | 260,000 |  |  |  | (18,056 | ) |  |  | 241,944 |  |  |  | - |  |  |  | - |  |  |  | - |
Patents |  |  | 108,247 |  |  |  | (56,166 | ) |  |  | 52,081 |  |  |  | 108,247 |  |  |  | (52,558 | ) |  |  | 55,689 |
|  | $ | 1,958,247 |  |  | $ | (124,400 | ) |  | $ | 1,833,847 |  |  | $ | 108,247 |  |  | $ | (52,558 | ) |  | $ | 55,689 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
Estimated Future Amortization Expense Years Ended September 30, |  |  |  |
2018 (April 1, 2018 through September 30, 2018) |  | $ | 166,689 |
2019 |  |  | 333,771 |
2020 |  |  | 333,448 |
2021 |  |  | 271,771 |
2022 |  |  | 246,363 |
Thereafter |  |  | 481,805 |
Total estimated amortization expense |  | $ | 1,833,847 |

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