Note 9 - Goodwill and Other Intangible Assets (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Sep. 30, 2022
Goodwill, Ending Balance	$ 736		$ 736		$ 736
Finite-Lived Intangible Assets, Net	4,951		4,951		$ 5,573
Amortization of Intangible Assets	200	$ 400	622	$ 1,365
Adjacent Markets [Member]
Goodwill, Ending Balance	700		700
Finite-Lived Intangible Assets, Net	600		600
Emerging Markets [Member]
Finite-Lived Intangible Assets, Net	3,100		3,100
Oil and Gas Markets [Member]
Finite-Lived Intangible Assets, Net	$ 1,300		$ 1,300