Note 10 - Goodwill and Other Intangible Assets - Schedule of Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Sep. 30, 2022
Goodwill, gross	$ 5,072	$ 5,072
Goodwill, accumulated impairment losses	(4,336)	(4,336)
Goodwill	$ 736	736
Weighted average remaining useful life (Year)	6 years 9 months 18 days
Other intangible assets, gross	$ 12,583	12,583
Other intangible assets, accumulated amortization	(7,778)	(7,010)
Finite-Lived Intangible Assets, Net	$ 4,805	5,573
Developed Technology Rights [Member]
Weighted average remaining useful life (Year)	13 years 2 months 12 days
Other intangible assets, gross	$ 6,475	6,475
Customer Relationships [Member]
Other intangible assets, gross	$ 3,900	3,900
Trade Names [Member]
Weighted average remaining useful life (Year)	2 months 12 days
Other intangible assets, gross	$ 2,022	2,022
Noncompete Agreements [Member]
Weighted average remaining useful life (Year)	2 months 12 days
Other intangible assets, gross	$ 186	186
Emerging Markets [Member]
Goodwill, gross	4,336	4,336
Finite-Lived Intangible Assets, Net	3,000
Adjacent Markets [Member]
Goodwill, gross	736	$ 736
Goodwill	700
Finite-Lived Intangible Assets, Net	$ 500