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Note 8 - Goodwill and Intangible Assets - Summary of Intangible Assets (Details) - USD ($) | Mar. 31, 2020 | Sep. 30, 2019
--- | --- | ---
Intangible assets, gross carrying amount | $ 1,719,750 | $ 1,710,431
Accumulated amortization | (685,589) | (534,797)
Intangible assets, net | 1,034,161 | 1,175,634
Technology-Based Intangible Assets [Member] |  |
Intangible assets, gross carrying amount | 614,519 | 611,043
Customer Relationships [Member] |  |
Intangible assets, gross carrying amount | 587,801 | 584,477
Trade Names [Member] |  |
Intangible assets, gross carrying amount | 213,746 | 212,537
Noncompete Agreements [Member] |  |
Intangible assets, gross carrying amount | 231,558 | 230,248
Patents [Member] |  |
Intangible assets, gross carrying amount | $ 72,126 | $ 72,126

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