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Goodwill and Intangible Assets - Additional Information (Details) - USD ($)	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Goodwill [Line Items]
Impairment of goodwill	$ 0	$ 0
Goodwill, Gross	13,329,000	$ 10,282,000
Genasys Spain [Member]
Goodwill [Line Items]
Goodwill and Intangible Assets, Foreign Currency Translation Gain (Loss)	$ 131,000

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

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Amount, before accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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