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Note 6 - Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2024
Sep. 30, 2024
Intangibles assets, net $ 115,822 $ 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 106,665 109,949
Intangibles assets, accumulated amortization 56,034 55,191
Intangibles assets, net 50,631 54,758
Trademarks and Trade Names [Member]    
Intangibles assets, cost 705 726
Intangibles assets, accumulated amortization 214 195
Intangibles assets, net 491 531
Noncompete Agreements [Member]    
Intangibles assets, cost 243,930 248,036
Intangibles assets, accumulated amortization 179,230 178,283
Intangibles assets, net 64,700 69,753
Other Intangible Assets [Member]    
Intangibles assets, cost 352,520 359,938
Intangibles assets, accumulated amortization 236,698 234,896
Intangibles assets, net $ 115,822 $ 125,042