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Note 8 - Goodwill and Intangible Assets (Details Textual) - USD ($)	6 Months Ended	12 Months Ended
	Mar. 31, 2019	Sep. 30, 2018
Goodwill, Ending Balance	$ 2,364,633	$ 2,445,990
Goodwill and Intangible Assets, Foreign Currency Translation Gain (Loss)	(130,403)
Goodwill, Impairment Loss	0
Patents [Member]
Impairment of Intangible Assets, Finite-lived	$ 0	$ 11,133

X

- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) goodwill and intangible assets.

+ References

No definition available.

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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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-Publisher FASB
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-Topic 350
-SubTopic 20
-Section 45
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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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- Definition

The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value.

+ References

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