Note 8 - Goodwill and Intangible Assets - Summary of Intangible Assets (Details) - USD ($)	3 Months Ended	9 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Sep. 30, 2018
Intangible assets, gross carrying amount	$ 1,774,784		$ 1,774,784		$ 1,810,076
Accumulated amortization	(477,819)		(477,819)		(252,730)
Intangible assets, net	1,296,965		1,296,965		1,557,346
Amortization expense	75,354	$ 81,262	228,793	$ 153,026
Technology-Based Intangible Assets [Member]
Intangible assets, gross carrying amount	635,045		635,045		648,208
Customer Relationships [Member]
Intangible assets, gross carrying amount	607,435		607,435		620,026
Trade Names [Member]
Intangible assets, gross carrying amount	220,886		220,886		225,464
Noncompete Agreements [Member]
Intangible assets, gross carrying amount	239,292		239,292		244,252
Patents [Member]
Intangible assets, gross carrying amount	$ 72,126		$ 72,126		$ 72,126

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

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