Note 6 - Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Sep. 30, 2024
Intangibles assets, net	$ 111,202	$ 125,042
Patents [Member]
Intangibles assets, cost	1,220	1,227
Intangibles assets, accumulated amortization	1,220	1,227
Intangibles assets, net	0	0
Developed Technology Rights [Member]
Intangibles assets, cost	108,265	109,949
Intangibles assets, accumulated amortization	58,448	55,191
Intangibles assets, net	49,817	54,758
Trademarks and Trade Names [Member]
Intangibles assets, cost	715	726
Intangibles assets, accumulated amortization	240	195
Intangibles assets, net	475	531
Noncompete Agreements [Member]
Intangibles assets, cost	245,330	248,036
Intangibles assets, accumulated amortization	184,420	178,283
Intangibles assets, net	60,910	69,753
Other Intangible Assets [Member]
Intangibles assets, cost	355,530	359,938
Intangibles assets, accumulated amortization	244,328	234,896
Intangibles assets, net	$ 111,202	$ 125,042