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Note 8 - Goodwill and Intangible Assets - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Intangible assets, gross carrying amount	$ 1,829	$ 1,710
Accumulated amortization	(886)	(534)
Intangible assets, net	943	1,176
Amortization expense	302	304
Technology-Based Intangible Assets [Member]
Intangible assets, gross carrying amount	655	611
Customer Relationships [Member]
Intangible assets, gross carrying amount	627	584
Trade Names [Member]
Intangible assets, gross carrying amount	228	213
Noncompete Agreements [Member]
Intangible assets, gross carrying amount	247	230
Patents [Member]
Intangible assets, gross carrying amount	$ 72	$ 72

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

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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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