Note 10 - Goodwill and Other Intangible Assets (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Goodwill, Ending Balance	$ 736	$ 736
Finite-Lived Intangible Assets, Net	4,805	5,573
Goodwill, Impairment Loss	0	4,336
Amortization of Intangible Assets	768	1,677
Adjacent Markets [Member]
Goodwill, Ending Balance	700
Finite-Lived Intangible Assets, Net	500
Emerging Markets [Member]
Finite-Lived Intangible Assets, Net	3,000
Goodwill, Impairment Loss		$ 4,300
Oil and Gas Markets [Member]
Finite-Lived Intangible Assets, Net	$ 1,300