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Note 9 - Goodwill and Intangible Assets (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Goodwill, Acquired During Period			$ 5,590
Goodwill, Impairment Loss			0
Finite-lived Intangible Assets Acquired			2,820
Amortization of Intangible Assets, Total	$ 169	$ 74	352	$ 149
Genasys Acquisition [Member]
Goodwill and Intangible Assets, Foreign Currency Translation Gain (Loss)			4
Assets Acquisition of Amika Mobile Corporation [Member]
Goodwill and Intangible Assets, Foreign Currency Translation Gain (Loss)			$ 474

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

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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