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Note 8 - Goodwill and Intangible Assets (Details Textual) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021
Goodwill, Acquired During Period	$ 0
Goodwill, Ending Balance	23,787	$ 23,834
Goodwill, Impairment Loss	$ 0
Genasys Spain [Member]
Goodwill and Intangible Assets, Foreign Currency Translation Gain (Loss)		65
Zonehaven, Inc and Asset Acquisition of Amika Mobile Corporation [Member]
Goodwill, Acquired During Period		21,128
Assets Acquisition of Amika Mobile Corporation [Member]
Goodwill and Intangible Assets, Foreign Currency Translation Gain (Loss)		$ 8

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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- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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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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