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Note 9 - Goodwill and Intangible Assets (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Goodwill, Acquired During Period			$ 20,992
Goodwill, Impairment Loss			0
Finite-lived Intangible Assets Acquired			13,128
Amortization of Intangible Assets, Total	$ 295	$ 74	647	$ 223
Genasys Spain [Member]
Goodwill and Intangible Assets, Foreign Currency Translation Gain (Loss)			46
Zonehaven, Inc and Asset Acquisition of Amika Mobile Corporation [Member]
Goodwill, Acquired During Period			20,992
Assets Acquisition of Amika Mobile Corporation [Member]
Goodwill and Intangible Assets, Foreign Currency Translation Gain (Loss)			$ 613

X

- Definition

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

+ References

No definition available.

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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.

+ References

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Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

+ References

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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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