Note 9 - Goodwill and Intangible Assets (Details Textual) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Sep. 30, 2023
Goodwill, Gross	$ 13,151		$ 10,282
Goodwill, Acquired During Period	2,772		0
Goodwill, Impairment Loss			$ 0
Amortization of Intangible Assets	619	$ 532
Genasys Spain [Member]
Goodwill and Intangible Assets, Foreign Currency Translation Gain (Loss)	105
Evertel Technologies, LLC [Member]
Goodwill, Acquired During Period	$ 2,772