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Note 6 - Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Sep. 30, 2024
Intangibles assets, net $ 108,136 $ 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 111,681 109,949
Intangibles assets, accumulated amortization 61,411 55,191
Intangibles assets, net 50,270 54,758
Trademarks and Trade Names [Member]    
Intangibles assets, cost 734 726
Intangibles assets, accumulated amortization 271 195
Intangibles assets, net 463 531
Noncompete Agreements [Member]    
Intangibles assets, cost 249,203 248,036
Intangibles assets, accumulated amortization 191,800 178,283
Intangibles assets, net 57,403 69,753
Other Intangible Assets [Member]    
Intangibles assets, cost 362,838 359,938
Intangibles assets, accumulated amortization 254,702 234,896
Intangibles assets, net $ 108,136 $ 125,042