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Note 8 - Goodwill and Intangible Assets - Summary of Intangible Assets (Details) - USD ($)	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Intangible assets, gross carrying amount	$ 1,810,076	$ 108,247
Accumulated amortization	(252,730)	(52,558)
Intangible assets, net	1,557,346	55,689
Amortization expense	231,901	7,216
Technology-Based Intangible Assets [Member]
Intangible assets, gross carrying amount	648,208
Customer Relationships [Member]
Intangible assets, gross carrying amount	620,026
Trade Names [Member]
Intangible assets, gross carrying amount	225,464
Noncompete Agreements [Member]
Intangible assets, gross carrying amount	244,252
Patents [Member]
Intangible assets, gross carrying amount	$ 72,126	$ 108,247

X

- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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