Note 4 - Business Combinations - Consideration (Details) - Evertel Technologies, LLC [Member] - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
	Oct. 04, 2023	Mar. 31, 2024	Mar. 31, 2024	Mar. 31, 2023
Cash paid	$ 923
Common stock issued	1,924
Contingent consideration	890		$ 60	$ (0)
Acquisition holdback liability			240	(0)
Common stock to be issued	685		$ 685	$ (0)
Working capital adjustment	(15)	$ (15)
Business Combination, Consideration Transferred and to be Transferred	4,637
Holdback Liability [Member]
Acquisition holdback liability	$ 230