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Note 5 - Goodwill and Intangible Assets - Summary of Intangible Assets (Details) - USD ($) | Mar. 31, 2018 | Sep. 30, 2017
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Intangible assets, gross carrying amount | $ 1,958,247 | $ 108,247
Intangible assets, accumulated amortization | (124,400) | (52,558)
Intangible assets, net | 1,833,847 | 55,689
Technology-Based Intangible Assets [Member] |  |
Intangible assets, gross carrying amount | 690,000 |
Intangible assets, accumulated amortization | (20,536) |
Intangible assets, net | 669,464 |
Customer Relationships [Member] |  |
Intangible assets, gross carrying amount | 660,000 |
Intangible assets, accumulated amortization | (19,642) |
Intangible assets, net | 640,358 |
Trade Names [Member] |  |
Intangible assets, gross carrying amount | 240,000 |
Intangible assets, accumulated amortization | (10,000) |
Intangible assets, net | 230,000 |
Noncompete Agreements [Member] |  |
Intangible assets, gross carrying amount | 260,000 |
Intangible assets, accumulated amortization | (18,056) |
Intangible assets, net | 241,944 |
Patents [Member] |  |
Intangible assets, gross carrying amount | 108,247 | 108,247
Intangible assets, accumulated amortization | (56,166) | (52,558)
Intangible assets, net | $ 52,081 | $ 55,689

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