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Note 5 - Goodwill and Intangible Assets - Summary of Intangible Assets (Details) - USD ($) | Jun. 30, 2018 | Sep. 30, 2017
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Intangible assets, gross carrying amount | $ 1,853,058 | $ 108,247
Intangible assets, accumulated amortization | (199,550) | (52,558)
Intangible assets, net | 1,653,508 | 55,689
Technology-Based Intangible Assets [Member] |  |
Intangible assets, gross carrying amount | 650,767 |
Intangible assets, accumulated amortization | (42,610) |
Intangible assets, net | 608,157 |
Customer Relationships [Member] |  |
Intangible assets, gross carrying amount | 622,474 |
Intangible assets, accumulated amortization | (40,757) |
Intangible assets, net | 581,717 |
Trade Names [Member] |  |
Intangible assets, gross carrying amount | 226,354 |
Intangible assets, accumulated amortization | (20,749) |
Intangible assets, net | 205,605 |
Noncompete Agreements [Member] |  |
Intangible assets, gross carrying amount | 245,216 |
Intangible assets, accumulated amortization | (37,464) |
Intangible assets, net | 207,752 |
Patents [Member] |  |
Intangible assets, gross carrying amount | 108,247 | 108,247
Intangible assets, accumulated amortization | (57,970) | (52,558)
Intangible assets, net | $ 50,277 | $ 55,689

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